I'll give a list of some things I just did as I'm put an A15 in my coupe: I'll leave out the costs for things that needed to be rectified because the engine sat.

Forged flat top pistons with rings were $550, the machine shop bill was $920 (boring, balance,bearings, new guides and seats) bigger valves were $125, Gaskets etc $100, i bought a cam from another forum member $125..........so near $1900.

Now add in I had an existing GX head, Dual Valve springs, flat slide carbs and header, I got a smoking deal on the parts and still had $750.

$600 for a 4 speed close ratio box and I'll have $1300 invested in a upgraded rear end


So I'm pushing 5K pretty quickly, I'm expecting to be around 110 at the wheels, the motor idles OK and should make power from 3500-7500 rpms.


The A12 I had made 80HP at the wheels (this is probably around 92-95 at the flywheel and needed to be kept above 4500 RPMs..............I had about $1300 in it.

Tom