tdecario

pretty sure someone asked this a while back, but curious to know what the differences were between the two. is their a section that talks about this?...

Cobra77

Cam, heads, throttle body/egr spacer, firing order (which I believe includes the computer since it has a roll with the injectors). I'm sure somebody else will chime in with others.

deadcarnahans

Correct.
The typical 5.0 Crown Vic engine should not be tossed aside and can be used as a suitable core. You are going to dump the stock heads and cam and stuff anyway if you rebuild for performance.

302f150

roller vs non roller i think also, intakes are diff, HP number are diff of course lol

ponyponer

those 302 non high output motors are pissants. haha.

BunnMan

All true...don't forget the bank vs. sequential injection on EEC IV systems and speed density vs. MAF on the same.

tom29

if your thinking you can just swap in a FInon H.o into theFI H.O , you are wrong . DO NOT EVEN TRY, me and my dad just went through all that this summer. unless you are going to carb it, ittll be a pain in the ***. the guy we bought our motor off of said it was a roller HO. nope, didnt even bother taken the valve covers off till it ran like ****..... so just in case your thinking of trying it, i would highly advise not..

tdecario

ic. toying with the idea of building an engine for my stang. the engine ihave in now will stay bone stock for now.how would i be able to tell the difference between a roller vs a non-roller block? im sure the grooving for the valve train is different, but my knowlege with the valve train is limited at best.