How about going from a '86 GM 6.2L diesel???? Had thoughts back then about getting into a 5th wheel (Mallard?????) Being brand newbie then I didn't know a darn thing about RV's, but DID love diesels. So never did get a 5er then, but upgraded to. '88 7.3L n/a F250. Truck ran great, but only so-so for mpg's. Was only so-so as well for towing our 4 place non V-nose snowmobile trailer. Couple gassers between the '88 and '03 6.Uh-Oh PSD, but the 6.0 did a very nice job towing till age, mileage and the preverbal "when" persuaded us to go to a '15 6.7 F350 SRW then a '17 6.7 F350 DRW. Tho we have a recurring CEL, the newest 6.7 makes my good ol 6.2 look like a lil Kohler 18hp gas job on a John Deere 318 garden tractor. Am just simply blown away with the power of it and not bashing any other brand but rather invite them to the party for they ARE ALL that good of engines.