I bought a '91 donor truck with a 351w EFI to swap into my '80 F-150 Ranger. I didn't know going to pick it up that the last time It ran was on propane, but for the drive I figured it couldn't be that much of an issue swapping it back for the price I paid($250). Now I'm finding little to no info on a converting back to gas or converting EFI to propane. Does anyone know what I need to look for or where to start?

 

the propane stuff you will simply strip off and toss (or give to me).
from there you are doing an efi to carb conversion. i will leave it to the more knowledgeable members to steer you in the right direction there.

 

well I want to keep it EFI, but from what I've been reading I can't find a straight answer what the conversion consists of, if I am reading finding right it seems there is "redneck" type with intake propane system(runs decent not right, and actual with injectors and all for proper conversion). But I can't find a straight answer on EFI. if it was carb. I can find info on it definitively, but not EFI. Maybe I'm not searching in proper terms or something, but info seems limited at best. If there are any parts propane specific that I pull off the truck I'll glad let anyone pay shipping to save them from the local dump.

 

The intake itself looks original to me(I'm by no means a ford expert grew up on chevy 350s in everything lol

 

Don't know if this helps, but I have a '95 F350/460 gas & propane. Only changes are the propane carburetor - I think 'mixer' is correct term - with it's airfilter is placed in the air tubes between engine & air cleaner. Original air cleaner box was removed. There is also a device to increase ignition timing when running on propane, a vaporizer, a lock out/shut off in the fuel line, plus the tank, plumbing & wiring. Short answer is no changes to the engine.


Propane is a very nice, clean fuel, & the conversion parts are expensive. If no one notices your free parts pay for shipping offer likely you could sell them on epay. If useable or repairable the stuff is too valuable to toss out.

 

You might want to read this thread:
https://www.ford-trucks.com/forums/1...-gasoline.html

I would love to have the parts also.

 

ok, so upon further inspection today, I think its a different throttle body on the intake for mixing the propane. I will take some pictures tomorrow, maybe someone familiar with these engines can tell me if I'm right about it being different.