Pre 87 (Non EFI) heads on 89 EFI block
My project is an 86 F250, with a 4spd and stock 460, about 105K miles. My dad bought it new, so I'm fixing it up, and having some fun with it. There is some sentimental value attached to it, but I also don't want to invest a pile, so I'm doing some junkyard building - it is just a truck, and the primary purpose is to haul wood and plow snow. It'll be a 0-5500 type engine.
I've sourced an 89 ranch truck, it's a little beat up, but has only 75K on it, with a 5 spd, and 460.
My plan is to swap the 5spd and block from the 89 into the 86, then use the heads/intake/exhaust manifolds from the 86.
There are two main benefits I expect to get from the 89 block, from my research (please to correct me if this isn't true):
1. The piston dish in the 87-92 block is only 7cc, while the stock 86 pistons were 22cc. With stock 86 heads this should bump my compression to about 9:1, give or take with my rough math.
2. Ford switched back to a straight up timing set in 87, so I don't have to worry about that
Will I run into any problems putting this combo together - head gaskets, water flow, oiling, etc... ??
Should I switch to the serpentine setup (if they had that in 89), or stick with v-belts?
I'll be looking into other performance questions eventually - such as minor work to be done to the heads, cam swap, intake, carb, etc... but right now I just want to know if my above assumptions are true and this will work.
Last edited by MTScott; 09-30-2019 at 03:53 PM.