I'm of the old school. I own and built 429 engines. now I know you can change a camshaft and valve train on a stock engine and gain substantial hp and tq, but will the same apply to our engines, say stage one, two, or three, without headers, programs ect...

preditor
4lb
k/n

 

Yes, but with the higher stages you'll need a tune to make it run smoother ang gain full potential. There are a few guys with cams on stock motors and they saw a good improvement. Danoid (on nloc) did Comp cams (more like a stage 2.5) with a 6lb lower and saw a 60+rwhp gain if I do remember correctly. I'm thinking of doing something similar in the future.