To knock about 90 HP out of it! I was being sarcastic. Look at the dyno sheets below, plain old 455 cast crank/Eagle rod/Ross piston build with #96 heads flowing 250cfm.
With the Comp XR276HR it not only didn't make shi# for power it pinged on the dyno hard enough to get a new set of rod bearings.
Changing only the cam the engine idled better, improved throttle response, less "reversion" and quite a bit more power everyplace.........Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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