I anm going to be rebuilding a 454 I got from RyanB. over the next year or so, but would like to start acquiring parts now. It's got the peanut port heads. I understand these run out of breath at around 4500rpm. My K5 is for trails and road trips to trails, and Oregon to visit my brother. I am not going for anything wild, but warmed over compared to stock. Would I be better off looking for a set of big oval heads? I plan on pocket porting and maybe going to bigger valves, and an RV cam. Should I keep the peanut ports, maybe grind the ports to match the intake, or should I look for some large oval port heads? I am very patient when it comes to finding the right parts for the right price, so it's not like I'm in any hurry. What would you all do? I dont want any high dollar aftermaket heads, just you all's opinion on the best stock heads for the kind of driving we do. EDIT: I am hoping to get a Mercruiser MPFI setup for it, if that makes any difference, but that will depend on if I can find one at the right price.