LS3 bellhousing bolt pattern

[ATKY]

Does anyone have a diagram of the bellhousing bolt pattern for the LS3.We are putting a Drenth sequential on and have to make a bellhousing due to not been available.Regards,Steve.

[GasMunkey]

It's the same as all the sbc bbc and Ls chevy v8's

[tinker-27]

It's Is nearly the same but with one missing , I have a bell housing you could borrow if you are stuck , there should be some dimensions on the net somewhere ?

[teamHOLDENracing]

I'll look them up tommorow for you.

Why make a bellhousing - why not make an adaptor plate to sit between the Drenth and the existing bellhousing?

[teamHOLDENracing]

Here you go:

Hole locations, looking at the bell housing from the back, crankshaft centerline is at (0, 0), +X to the right, +Y up:
(X, Y)
(-4.125, 2.000)
(4.125, 2.000)
(4.875, -2.812)
(-4.250, -2.812)

1/2-13 bolts

All dims in inches

These are the dimensions for the bolt holes in the standard chevy bellhousing for the gear box. Just realised that may not be what you are after - you probably mean the holes in the block for the bellhousing? Don't have those, sorry.


Still think its easier to make an adaptor plate rather than a bellhousing....

[ATKY]

Thanks for info.Managed to get some drawings off net for SBC which will give me info I need.Still working out best way to tackle job,but may go with bellhousing to gearbox as suggested.Again,thanks for info.Regards,Steve.