Just got back from the engine builder with the engine and was wrong on one thing. It was not a .060 motor but rather .040. The peak horsepower was 492 at 5900 RPM. Peak torque was 497 @ 3900 RPM and falling from there to 429 @ 6000 RPM. Ron told me that had they been able to run the MSD, the engine would have pulled 500-505 hp through the exhaust. I cannot tell you how many people have told me that a big block Chevy cannot produce 500 hp through manifolds. Wrong!
The ONLY differences between this engine and the last one Ken built for me was this one was a 4492 carbed (built by Eric) and run through manifolds whereas the other was a 4557 (built by Woodriff) and run through headers. That and the previous engine was overbored .060. Other than that they were built identically with no modifications using a very stock style cam and piston configuration. The 4557 engine pulled a max of 475 hp at 6100 RPM and max torque of 483 @ 3600 RPM.
