Plymouth B Body Mechanical Upgrade
Discussion
Inspired by Newsatten's hard work and pics of his Challenger during the resto, I was wondering if anyone would be interested in a thread on my 69 Roadrunner.
Fortunately for me, no bodywork required but quite a few upgrades happening.
I'm fitting full Hotchkiss TVS suspension & Willwood discs all round this time.
Once that's out of the way, 6 Pack EFI, Air Con and a change of the interior from the grey tweed (earlier resto) to something more original.
Cast your votes now to see greasy bits going on the Flying Banana
Fortunately for me, no bodywork required but quite a few upgrades happening.
I'm fitting full Hotchkiss TVS suspension & Willwood discs all round this time.
Once that's out of the way, 6 Pack EFI, Air Con and a change of the interior from the grey tweed (earlier resto) to something more original.
Cast your votes now to see greasy bits going on the Flying Banana
Allrighty then.
Bit of backround first.
The Plymouth was originally a Sport Satellite with a 318 2bbl & A904 auto.
At sometime in the past, it's been subject to a makeover and is now fitted with a 440 Six pack & 727 Torqueflite. Cool.
The bodywork & trim are great & the interior has been done in an 80's style grey tweed, which is very comfortable but I'm not a fan.
Mechanically, it's very good but it is just over 50 years old and 60's style suspension, even when brand new doesn't quite cut it these days.
Same for the brakes. The front had already been converted to 73 & up factory discs with single pot calipers which do work just like a 73 set of brakes
There's no feeling like doing 75mph even at a safe distance and have a new car with big wide tyres, 4 or 6 pot calipers & ABS throw the anchors on in front of you as you close that gap.
So, upgrade time.
There's lots of kit available but I went for the Hotchkis TVS system rather than a mix & match approach.
Here's what you get.
Missing from the picture are front & rear sway bars.
Basically, you get heavy duty everything, geometry corrected A-Arms & springs, adjustable shocks. adjustable strut rods, heay duty torsion bars, quick ratio steering box arm & weld in subframe connectors to stiffen the chassis.
So far, so good & so expensive
Naturally, the first mission is to strip off all the old parts with all the fun that entails.
Hard to reach bolts, seized nuts, rusty bits etc.
Then, assemble in reverse order as they say.
But bugger. Look at that bunch of nana headers.
That's right where the new thicker torsion bars go.
Unfortunately, no option to hammer & dimple one of the pipes as that would virtually close it off so I had to spring for a new set.
Old headers. We have no clearance, Clarance.
New Headers. Much better.
Here's the new adjustable upper A Arms & shocks in position.
New rear leaf springs & shocks.
The subframe connectors bolt to the other side of the spring hangers
And a bracket is welded to a crossmember at the front for the other end.
Back to the Zorst. Well Crap. Doesn't meet up.
The car is currently on a trailer to an exhaust shop to get that sorted.
More to follow when the Willwood brakes go on.
Bit of backround first.
The Plymouth was originally a Sport Satellite with a 318 2bbl & A904 auto.
At sometime in the past, it's been subject to a makeover and is now fitted with a 440 Six pack & 727 Torqueflite. Cool.
The bodywork & trim are great & the interior has been done in an 80's style grey tweed, which is very comfortable but I'm not a fan.
Mechanically, it's very good but it is just over 50 years old and 60's style suspension, even when brand new doesn't quite cut it these days.
Same for the brakes. The front had already been converted to 73 & up factory discs with single pot calipers which do work just like a 73 set of brakes
There's no feeling like doing 75mph even at a safe distance and have a new car with big wide tyres, 4 or 6 pot calipers & ABS throw the anchors on in front of you as you close that gap.
So, upgrade time.
There's lots of kit available but I went for the Hotchkis TVS system rather than a mix & match approach.
Here's what you get.
Missing from the picture are front & rear sway bars.
Basically, you get heavy duty everything, geometry corrected A-Arms & springs, adjustable shocks. adjustable strut rods, heay duty torsion bars, quick ratio steering box arm & weld in subframe connectors to stiffen the chassis.
So far, so good & so expensive
Naturally, the first mission is to strip off all the old parts with all the fun that entails.
Hard to reach bolts, seized nuts, rusty bits etc.
Then, assemble in reverse order as they say.
But bugger. Look at that bunch of nana headers.
That's right where the new thicker torsion bars go.
Unfortunately, no option to hammer & dimple one of the pipes as that would virtually close it off so I had to spring for a new set.
Old headers. We have no clearance, Clarance.
New Headers. Much better.
Here's the new adjustable upper A Arms & shocks in position.
New rear leaf springs & shocks.
The subframe connectors bolt to the other side of the spring hangers
And a bracket is welded to a crossmember at the front for the other end.
Back to the Zorst. Well Crap. Doesn't meet up.
The car is currently on a trailer to an exhaust shop to get that sorted.
More to follow when the Willwood brakes go on.
newsatten said:
Great stuff son!
Cant wait for the update on how it actually all works on the road, nothing better than a proper user review!
Well it can't be worse than the standard set up Cant wait for the update on how it actually all works on the road, nothing better than a proper user review!
In all honesty, it wasn't "that bad" to drive around town in that floaty 60's 'Murican way.
Certainly comfy but wallows around like they all did back in the day.
Plus, quite easy to overpower it all with the 440.
I think we're all a bit spoiled by modern cars.
This is my daily driver here.
485hp, 6 pot Brembo's, Adaptive ride control etc. It's a new car.
When you drive this all week and then on a Saturday night take the old bus out it can be a bit OMG with the difference.
Obviously the Nana is never going to be anything like the Challenger but I'm hoping to make it feel a bit more up to date.
I don't have any way to quantify the changes when it's done but here's a review of the system on a 67 B Body, which seems to make quite a difference.
https://www.hotrod.com/articles/hrdp-0909-mopar-su...
Edited by HD Adam on Thursday 16th July 21:44
HD Adam said:
Well it can't be worse than the standard set up
In all honesty, it wasn't "that bad" to drive around town in that floaty 60's 'Murican way.
Certainly comfy but wallows around like they all did back in the day.
Plus, quite easy to overpower it all with the 440.
I think we're all a bit spoiled by modern cars.
This is my daily driver here.
485hp, 6 pot Brembo's, Adaptive ride control etc. It's a new car.
When you drive this all week and then on a Saturday night take the old bus out it can be a bit OMG with the difference.
Obviously the Nana is never going to be anything like the Challenger but I'm hoping to make it feel a bit more up to date.
I don't have any way to quantify the changes when it's done but here's a review of the system on a 67 B Body, which seems to make quite a difference.
https://www.hotrod.com/articles/hrdp-0909-mopar-su...
Yeah thats what i mean, You know how it drove before, so are there noticeable improvements in general handling, body roll, stiffness etc??In all honesty, it wasn't "that bad" to drive around town in that floaty 60's 'Murican way.
Certainly comfy but wallows around like they all did back in the day.
Plus, quite easy to overpower it all with the 440.
I think we're all a bit spoiled by modern cars.
This is my daily driver here.
485hp, 6 pot Brembo's, Adaptive ride control etc. It's a new car.
When you drive this all week and then on a Saturday night take the old bus out it can be a bit OMG with the difference.
Obviously the Nana is never going to be anything like the Challenger but I'm hoping to make it feel a bit more up to date.
I don't have any way to quantify the changes when it's done but here's a review of the system on a 67 B Body, which seems to make quite a difference.
https://www.hotrod.com/articles/hrdp-0909-mopar-su...
Edited by HD Adam on Thursday 16th July 21:44
I just dont trust anything written by HOT ROD contributors, it all sounds so yank, and so false, hence why i was curious regarding your views! lol...........
Im generally happy with the way the Chally drives, which is generally like a 50 year old car!
Im never going drive it like a lunatic, its just plain fun to blast along a legal speeds,
I took the Chally to work today, everybody fell in love with it, the younger ones kept asking is it quick??
In 71' yeah it was , in 2020 absolutely not!
Matt Harper said:
Funny you should say that.Here's a better shot of underneath before the header change.
The Y Pipes are for the electric cutouts.
Sounds great with them open but runs like crap.
I'll post a soundclip video when it's back together.
BTW, the Nana stays. I like the Nana
Newsatten said:
Yeah thats what i mean, You know how it drove before, so are there noticeable improvements in general handling, body roll, stiffness etc??
I just dont trust anything written by HOT ROD contributors, it all sounds so yank, and so false, hence why i was curious regarding your views! lol...........
It's not finished yet.I just dont trust anything written by HOT ROD contributors, it all sounds so yank, and so false, hence why i was curious regarding your views! lol...........
I'm borrowing a ramp at at a friend's shop so it has to be done between paying jobs.
There will certainly be a write up at the end.
Some progress on the brakes.
Fronts are easy peasy, all just bolts up. Which is nice.
Rears? Not so much when going from drum to disc.
Had to pull the half shafts so whilst they're out, it's getting new wheel bearings & a bit of R&R.
Anyhoo, here's the rear set up on the bench with the calipers & new handbrake assembies.
I shouldn't be surprised but my 15" Rallye wheels don't fit over the new big discs & callipers
You can get an aluminium 17" Rallye wheel which looks gorgeous, is v expensive but would mean you won't be able to see all the sexy new hardware.
I've decided to go with a classic set of polished Torque Thrusts in 17" with Nitto tyres so it's all on view through the spokes.
Here's the exact same combo on another 69.
Onwards & upwards.
Fronts are easy peasy, all just bolts up. Which is nice.
Rears? Not so much when going from drum to disc.
Had to pull the half shafts so whilst they're out, it's getting new wheel bearings & a bit of R&R.
Anyhoo, here's the rear set up on the bench with the calipers & new handbrake assembies.
I shouldn't be surprised but my 15" Rallye wheels don't fit over the new big discs & callipers
You can get an aluminium 17" Rallye wheel which looks gorgeous, is v expensive but would mean you won't be able to see all the sexy new hardware.
I've decided to go with a classic set of polished Torque Thrusts in 17" with Nitto tyres so it's all on view through the spokes.
Here's the exact same combo on another 69.
Onwards & upwards.
A quick update for those still interested.
New Blingy 17" wheels have arrived.
Big Boy rear brakes on, new S/S brakelines and rear axle rebuilt with new bearings.
Basically, now I'm just waiting for the Hotchkiss front & rear sway bars, on backorder, which should be another 10 days or so and get the exhause hooked up.
New Blingy 17" wheels have arrived.
Big Boy rear brakes on, new S/S brakelines and rear axle rebuilt with new bearings.
Basically, now I'm just waiting for the Hotchkiss front & rear sway bars, on backorder, which should be another 10 days or so and get the exhause hooked up.
I can't believe you thought the new brakes would fit behind the OEM Rallye's 
Not a fan of the chrome finish wheels.....a bit too modern look for my tastes.
Back in 2012, I was parked in the paddock next to this '69 Camaro at one of the RAF Marham track days, that the owner had chucked the whole Hotchkiss catalogue at, so got talking to the owner quite a bit, and it certainly seemed to cope with the corners very well.
Not a fan of the chrome finish wheels.....a bit too modern look for my tastes.
Back in 2012, I was parked in the paddock next to this '69 Camaro at one of the RAF Marham track days, that the owner had chucked the whole Hotchkiss catalogue at, so got talking to the owner quite a bit, and it certainly seemed to cope with the corners very well.
Gassing Station | Yank Motors | Top of Page | What's New | My Stuff