So, whether I am right or wrong, lets assume i am wrong, that with either the .397" or .410" cams listed as 5.9 cams between 96-03 as biggest possible, would that not be an even better reason to change it to at least .450"? I think that was part of OP's original inquiry. The difference between the .397" cam and a .450" is huge, what the 5.9 begs for with stock heads. I would say .525" but didnt sound like OP wants to deal with springs. $.02
