First, I am sorry. I know this subject has been beat to death...

I have a 1991 F150 Std Cab XLT Lariat with 302/E4OD. The truck has 177k miles, 3" lift w/ 33x12.50s.

I have replaced the tranny/Xfer case and am now eye ballin the power plant. I have been thinking about this for about 4 years so its kinda over due, in that time I have scoured this and every other f-150 forum out there, just when I think I have it figured I read some post saying someother post is incorrect--and what appeared to be common knowledge was allegedly wrong.

What I know: 351W will fit. I want MAF so I am going newer.

What I need to know: Need the newer computer? Need the newer harness? Accessory & bracket interchangeability? When I yank the doner motor what else do I need to snag?

I am a seasoned mechanic...but on aircraft. I have done a lot of work on this ole truck but havent attempted a motor swap before. Are there guides for this change over out there that I can pick up for referance in case I forget to label or overlook something?

Thanks in advance...also once this process starts I plan on documenting in painstaking detail along with pictures start to finish.

 

https://www.ford-trucks.com/forums/1...-5-8-swap.html

From a couple days ago. Might be some info in there.

 

Thanks, I think this is just one of those things that you can read about every day but you're just not going to get all the answers unless you dig in and get dirty...

 

If you want simple don't try to do a MAF swap at the same time, get the motor in and working and upgrade the EFI system later.
You need a complete 5.8 EFI motor oilpan to throttlebody, very few parts are interchangable except for the accessory brackets and the water pump. For 100% plug and play compatibility get one from the same year truck, but it's generally accepted the '94+ 5.8 is the best performing version and it can be swapped in with a simple distributor mod and lower intake swap. DO NOT use any wiring that comes with the donor motor just connect the 5.0 harness to the 5.8 and plug in a 5.8/E4OD computer, the only other part you'll need is a 28oz E4OD flexplate though the exhaust Y pipe will have to be widened as well.