[Stan Weiss]

Originally Posted by napster

I understand the idea of something different. I have my share of 461's. I went with the 433 RA IV in my '70. 4 inch stroke forged SCAT crank etc... I love it. Recently had to change the reproduction RA IV intake manifold with a real deal RA IV intake. The repro wasn't lining up properly and had two major vacuum leaks. The real RA IV intake lines up so much better. My mechanic thinks the intake cost me 10 to 15 HP when the engine was dyno'd. It was a pure bottleneck. Cam is a Butler grind (see below). Compression is a tick above 10:1.

https://www.youtube.com/watch?v=AXveB8zehOw

Also upgraded the lifters to the new Comp Cam Evolution. Very quiet as opposed to what you hear in the video.

Used exhaust manifolds with the 2.45 inch outlet. Figured the HP was 460 before the intake change now I would say it is 470-475.

Do you have a dyno sheet that you can post?

Stan