Spark plug advice

[davidindevon]

I've looked through the workshop manual but no luck

I'm looking to buy Denso Iridium IW22 spark plugs for a 130 big valve 1558 lotus (1973) These Denso plugs have...

Thread diameter 14mm
Thread reach 19mm
Seat - Flat
Hex size - 21mm
Tip - projected

Can anyone tell me if they will fit please?
Thanks

[tempus]

The dimensions are correct and the type is a match.