Newbie with a good start, i think
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The Best V8 Stories One Small Block at Time
So if he put a hotcam in it, who knows what internals are in it. He could of replaced it with a cast crank which is weaker than the stock crank.
The best thing to do would be tear the engine out and open it up and see what has been done to it. Most likely you will have to pull the crank/rods/pistons and replace them. Have to send the heads out to be worked, or buy new heads, since as stated they are probably stock which is choking the engine of air.
Remember adding cubes without allowing more air in out nets you nothing.




