![]() 474/.510) than your heads and tune will handle. My guess is that the ZZ4, while a really good cam (used a couple of 'em) for appropriate use, just might be a bit more &. 040 over 305 block) with L98 aluminum heads. My brother needed one and I'm planning to use the other in a 336 (3.75 stroked. Performer RPM power packages also help make your engine more efficient, with the potential for increased mileage. That is the biggest cam I would use on a stock engine. Comp extreme energy XE249H is also computer frendly and will work good. You can also go with 1.6 ratio roller tip rockers with that cam to gain even more torque. I bought two of 'em a few years ago just because they were cheap (for hr cams) at $140 for the pair shipped, off of ebay back when guys were replacing them in Ramjet and HT383 crate motors with stupid thumpy cams. The Performer RPM cam has more lift and duration than most street cams with acceptable low-end torque while maintaining 10'-12' Hg idle. Your best bet if you dont want to get a new chip is Comp Cam 252BH-11 Great low end cam. Haven't used one myself yet, but everything I've read about it (and that is LOTS) makes me think it is something you ought to look in to, if you want good low to mid rpm grunt. ![]() Moderate lift and duration is supposed to wake up the stock 350 and still play nice with your oe heads and tune. For what my 1 cent is worth I think the cam you are looking for is the GM "Ramjet" p/n 14097395 cam.
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