Re: 302 vs 351/400m
Figuring out the wiring of the ignition system, and splicing the wiring from the Ranger to that. All the parts you need are made for a 5.0L conversion, 351m/400 are BIG engines; they make a 5.0L look small in comparison. They take a lot of money to make power, but can make big power. Headers, steering, etc going to need to be custom and on you to figure out and fabricate. I actually had a 351m & C6 to swap in, but I traded them both for a running 5.0L and got an AOD from the junk yard.
1987 Ford Ranger Short Bed 5.0L/T-5 Project
1988 Ford Ranger Long Bed Parts Truck
1993 Ford Tempo 2.3L OHV HSC Auto - D/D Stock.
1999 Honda Accord VTEC Auto
2002 Dodge Caravan - 3.3L Auto