Figure the 352 comp to be 9-9.5:1 The only real issue is have the 352's valve seats been changed to hardened seats for unleaded gas? Also what will it take to bolt the 460 in there? With all the conversion kits out there i'm sure there is one available. With those factored in I'd then take a good look at both engines and see which is the better of the two. Machine work being the factor here and which has better heads intake and such to work with. Then figure the budget you have to work within. Do you want to drop the 460 in stock and as is or are you thinking about some aftermarket things for either as well. Aftermarket parts are about the same in price for each engine though. Then keep in mind the rest of the drivetrain as well. A higher HP engine (FE or 460) is going to beat the snot out of some stock trannys and rears depending on which your truck has now. I can't deny the 460's make good power but so does as well built FE. The weight factor is a non issue as well. They are both really close there. G.