Got ahold of the original owner - Below are specs as provided by him. The Carb descrip is now inaccurate - It's a 400 series. I don't know what (if anything) else has been changed in the interim

Block is 1973 model.

Main bearing caps were line bored,

High perf cam & main bearings,

Cylinders bored 60 over,

Moly rings(all were filed to have the same air gap), Pistons & crank were balanced, pistons were measured & then cylinder hole was bored to fit each piston, each piston is numbered for the cylinder it was in.

High performance Melling oil pump.

TRW double roller timing set.

Camshaft was stock RAM AIR III.

Lifters were high perf Melling.

Heads:

Supposed to be 68 RAM AIR III,

Intake valves are 2.11"

Exhaust valves are 1.77", all were swirl polished.

Valve guides were bronzewalled.

Rocker arms are RAM AIR III, 1.65:1 ratio, which increases valve lift .050".

Rocker studs were from big block Chevy, 7/16"

Rocker nuts were from big block also.

All intake & exhaust ports were polished & gaskets matched.

Edelbrock intake manifold with Holley 750 dbl pumper with everything manually adjustable.

Transmission is short shaft turbo 400.

All B & M trans parts used. Somebody took off the pan, it was a deep pan that used a Chrysler filter.

The exhaust manifolds & muffler were stock from 1974 model.