67 Cuda: disappointing dyno numbers, need some advice!

crackedback said

JMO, that's a 350ish HP engine on a good tune up unless the heads are exceptional on performance. With the 450 lift, bad lifter angle and rockers that are rarely at the true 1.5 ratio, the valve is likely seeing something in the .420-.425 range

About where it should be for RWHP is my guess. Might scratch a little more out on the tune up.

Steel crank??? All 360 factory cranks for that time period are cast. Usually when that "term" is thrown around it implies a forged unit which is highly unlikely in this engine.

Heads, intake and camshaft are ares to investigate to get the RWHP where you want it.

Agree with PRH, somewhat new build and the rockers look like they've never seen a hot tank.

Click to expand...

it is a 74 block but it was built around '95ish, talked to him again today he says pistons are TRW 9.5:1, forged and crank is forged. also heads are closed chamber? Not sure if 308's were closed chamber? He drove the engine in a Demon till wrecked, then he put it in Cuda. The Cuda sat after he put the motor in it for about 15 years why it looks rough in those pics. Before I got it back running I sprayed seafoam in each spark plug hole till full. Let sit for a couple days then turned engine over by hand. It turned very smoothly for several rotations changed the oil and fired it up. Since then I have changed the oil 2 more times in less than 1.5k miles. Maybe corrosion throughout the engine could be a problem?