I don't even run 351's in my derby cars. I would do a cummins swap or look for a Lower mileage used motor. You will be going back In terms of mpg and power. I've ran those motors harder than anyone probably will and compared to a 460 or a 5.4 they are both far better motors. If you are building a hunting truck then you can always just weld motor mounts in and weld in a cross member. I put 460's in GM cars all the time, we use 1 1/4 threaded rod and make motor mounts. If you have a donor truck it could be a fun swap.

 

Well, I dunno for sure yet, but I just got a line on a wrecked truck with built 6.0, at the local junk yard, and they're in need of a 5.4. Might be going a whole different direction, now.

 

Supercharge the 5.4 and drive with pride.

You mentioned an AOD? Not only on the wrong track there, you are on the wrong gauge railroad....

You are not alone in your quest. Tuner, gears seem to the first steps, then PI heads, and beyond:

https://www.ford-trucks.com/forums/9...-4-triton.html

https://www.ford-trucks.com/forums/1...-upgrades.html

Tuner/Programmers - Ford F150 Forum - Community of Ford Truck Fans

https://www.ford-trucks.com/forums/1...superchip.html

https://www.ford-trucks.com/forums/1...ercharger.html

IMO it's easier to research ways to make the 5.4 come alive than to rebuild your truck to accommodate an older powertrain. ymmv

 

If you're going to go to the trouble of an engine swap, and want to utilize Kasse parts, I would look scare up a 460 block and look at the Kasse Boss 9 package. It'd be a much better engine for Super Duty street use.

 

Those heads look pretty awesome, would be awsome for my 87 stang GT

 

The more I look at it, the more likely the 6.0 swap seems to be. Gotta take Jim a six pack of beer on Saturday, and see where that gets me

 

I guess I misses it but a 6.0L what? LS?

 

I ran 351's in Mustangs on circle (dirt) tracks for years and never blew an engine or broke a rod. Turned consistently 62-6300 and won many races. They are a great engine but nowhere near as good as the 5.4 in developing power. If you're bound and determined to swap, go the V10 route as it's a much easier swap then the 5.8 route.

 

6.0 powerstroke. It's already bulletproofed.

 

Well, whatever I'm gonna do just got moved up to right now. Damn motor seized.

 

Wow, any clue what happened?

 

Nope. Oil is good. I'm completely perplexed. Went out to the junk yard today, to see bout that 6.0. They wanted to see it run, so I popped the hood, fired it, and it ran clean and smooth. Shut it off, went inside to work a deal, came back out and it wouldn't start. So we threw cables on it, cause it was just clicking like a dead battery. Well, once it had juice, it sounded like the started had plenty of power, but just wasn't turning, so grabbed a pipe wrench, threw it on the front pully, and it wouldn't budge.

 

So I now have a 6500lb lawn ornament...

 

Something seems really odd, I've never heard of one that siezes right when you shut it off. Something on your belt drive could have siezed and prevented the engine from turning or you could have a bad starter.

 

That's entirely possible. Happened to my wife's old GMC Jimmy. She said it started making a "bad noise", then died and wouldn't turn over. I couldn't even turn it over with a wrench on the crank, so it seemed like the engine had seized. I took off the belt, hit the key, and it fired right up. It was the alternator that had seized up.

Honestly, I really can't see a 5.4 just seizing up for no apparent reason, even at 275K miles. That's really not high mileage for a 5.4. We've got a whole fleet of them at my work, and 275K would be low miles in our fleet. Some of them have over 500K on them and still get heavily used and abused every day.