Jesse's is the max i would go for in a 5.3.....Ive always read anything over .600" (Not saying .60X is bad either) lift starts causing more wear and since most of our trucks are DDs, i wouldnt go above that. Just from reading ive done n whatnot....I think 220/224 or close to that would be nice...pretty much jesse's camb.
the kooks catted Y is nice but u can make any ORY into a catted Y for cheaps, imo. I'll see how long these cats last....havent ready anything bad about them n some people say they pass smog still, others said they failed but greatly reduced the smells. Might have to get my :secret: smog shop to hook it up to the machine but not enter info and do a trial run. :hmm: