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The biggest problem with the small block mopars are the main webs between the cam and the crank. They are not strong enough to support much over 600 - 650 HP. you will find people out there that have made more power than that and had no problems and some that haven't even made that much and had big problems. Main cap walk and the block its self are the biggest issues. A good main cap system (pro-grams) or something similar with studs and a good balance job are highly suggested.




I'm surprised at your findings. I've seen these problems with B/B but never a small block. I've never seen a small block pull a main web out like a B/B? Any pics? Split cylinder wall possibly.
We've run boosted ones for years with no failures, Yet.
Doug