Suggestions Please 7.3 mods

[scrubbuck69]

Alright guys,
I have bought a 1978 F250 crew cab 4X4 with a Fuel Injected 460. Sweet truck if I do say so myself.
I have a buddy who works for an ambulance service and takes care of all the trucks.
He has eight 7.3 chassis laying around with 180,000 to 230,000 miles on them.
He also has 2 newer 08-09 6.0's with one of them only having about 25,000 miles on the motor. Repeat----complete chassis minus the box! Apparently they put the 6.0's in the van chassis longer than the trucks.
I can get either the 7.3 or the 6.0 for next to nothing. Scrap price basically. What do you guys think would be a better motor for the 78 and an easier swap.
It is going to be a weekend cruiser and might even pull my fifth wheel with it locally. No mudding or crap like that.
I like the 7.3 but the 6.0 would be quieter in an old truck like that and probably get better mileage.
Also,
I might have some 7.3's and 6.0's with trannys for sale shortly. They were all ambulance motors and have been maintained accordingly. My understanding is that there are several differences. Van chassis are not inter-cooled and have a bigger turbo to make up for it. I think that is the only major difference.
And ideas or suggestions would be appreciated!!

[7.3HeavyHauler]

wow i'd buy every single one he had, if i'm not mistaken those ambulances came with an auxiliary braking system, that would be worth its weight in gold for those hauling professionally.

[AgTires4295]

Road Trip to Michigan!!!

I don't think the 6.0 is any quieter than the ol' 7.3 Sounds like a sweet deal since you can work on the engine as you please OUTSIDE of the truck. Whichever one you get, it'll be pretty neat to have in your '78.