347 Stroker - Explorer EFI

[jimbolimbos]

Tuning for a 347 isn't a problem at all as long as you don't use a radical cam.

I wouldn't sweat using a GT40 intake on a 347 unless it's going to see crazy high rpm like constant dunes. Most Bronco builds are for low end torque and good road manners, following what the Mustang crowd does will just eat at the pocket book, shift the usable rpm range higher, and sacrifice idle quality. Bigger injectors isn't a bad idea if you're on an early 40 PSI system, if you go 99-01 the stock injectors should be fine at 65 PSI (unless you're running crazy high RPM).

The A9L is a Mustang computer, no need to hunt one of those down if you're using all Explorer electronics for the rest of it.

Valve springs should absolutely be upgraded if changing the cam.

I just went with atomic myself with big radical comp cam mustang shorty headers so basically my stock computer only runs the inside of the explorer msd runs motor and trans and fuel and fans much easier on the long run and I can change shit firmness and duration between shifts on the fly anyway no check engine light or issues of any kind from stock computer