[Jac Mac]

Not 100% sure on this but believe regs/rules are very tight, I think the FIA approval # your looking for in this case is 115, I would strongly suggest that you have your client obtain & forward the FIA stuff to you if you intend to abide by those rules, my thoughts on your questions below from stuff I have read in relation to Daytona Coupe, it may not apply to 289 Cobra.

Originally Posted by blykins

Doing an engine build for a UK customer, running a Kirkham 289 Cobra in FIA road racing class. Anyone have any papers handy? Need some engine rules...

Intake options?48 IDA's

Compression ratio?As high as you can obtain with flat top pistons & 289 Hi Po type heads

Camshaft rules?Flat Tappet & I think the old 'C7-- Le Mans Cam

Anything about rocker arms?The old ball & stud used by HP 289 etc- 1.6/1 rocker ratio

Amount of overbore allowed? Service sizes for 289 at time- presumably 4.030"

Valve size limits?IIRC 1.56 ex & 1.875" inlet.

IIRC block had to be 289 2 bolt, the later GT40 is allowed a pre production version similar to the Boss302 block.

I could be wrong as to the requirements for the series your customer intends to compete in though, get the rules in hard print before starting.