I have a 1995 F150 I bought new and absolutely love, but after 255000 miles the 300 6cyl is tired. I am wanting to swap it with a 5.8L V8 and automatic transmission. Can anyone give me an idea what is involved?

 

Change radiator, engine, mounts, tranny, flywheel/flexplate, EFI harness, computer, rad hoses, emissions equipment, vacuum routing, possibly front springs but unlikely.

If you find yourself a complete donor truck, take anything engine/efi related and it makes the swap that much easier. Also consider vans, as they are often a good source as well.

If you try to do it part by part, you're probably going to go insane.

 

I dont think you will have to switch front springs, I'm pretty sure the 300 weighs more than the 351.

 

New motor mounts, new tranny crossmember, new computer with wiring harness (Try to get the one you need with the motor). If it were me, I'd have the 300 rebuilt, because the 351 isn't going to have a whole lot more torque than the six did. Also keep in mind that the 351 is going to suck a lot more gas than the 300 will.