How hard is it to swap from a 302 to a 351?
What all needs to changed and swapped to make it work?

 

What you need to change.. The complete engine, the flywheel or flexplate, and PCM.
What you do not want to change.. any wiring under the hood.

 

Paul beat me to the punch line but this search result has plenty of info for you to reference: Ford Truck Enthusiasts Forums - Search Results

 

KEEP 302 PCM. run 351w on MAF instead of speed density. much better system.

 

OP didnt mention on his post that the truck is SD or MAF. If SD, he'll still need to replace the 5.0 PCM to a MAF puter, yes?
Can he still use a 5.0 SD computer on the new 5.8 with no drastic problems?

 

Can anyone comment on doing the opposite?
I have a 95 f250 H stamp vin with a 5.8l with an E4OD and I want to know if a 1994 F250 5.0l with an E4OD will swapout? Im thinking the Y pipe will defineately have to be changed.
Also, will the trannys swap out with no issues?

 

'94 5.0 will swap no problem as will the trans but this will be a downgrade. Same rules apply, don't change any wiring in the '95 but do change the PCM, and yes the Y pipe will have to be changed or modified.

 

Block is the same correct?

 

Engine block? No, the 5.0L and 5.8L engines do not share the same engine block. The 5.8L uses a taller deck height. This is true for all years....

 

Ok. So what on tranny will I have to change if I take the tranny from the 302 and put it on the 351?

 

The transmission is basically the same from 1994 to 1995. The only thing that comes to mind is the connector for the MLPS was changed in '95. Same electrical function just redesigned to be less prone to damage from moisture. Not sure if the solenoid block connector was changed as well, I think it did.....

 

Thanks for all the help. Will let you guys know how it goes this weekend.