We've had 3 7.3's and 5 6.0's in our family and no 7.3 problems, a few 6.0's issues but i think both are good choices. 6.0 will give ya more power but the 7.3 will probably not break down as much.

7.3l I recently ourchased one. My father owns a 350 7.3l with 185k. Ford tech told him and me to only buy a 7.3l good luck with your pourchase.

Yea I agree with you all the way! My 7.3's never break down and they use about half the fuel that my 6.4 does pulling the big trailers. Everybody is talking about how cheap the 6.0's are to mod, but with my own experience if you don't do somtheing with the head gaskets and pull with a chip or programer you are going to have trouble. I am talking about big trailers, boats and travel trailers are probably ok. With our big trailers I blew the head gaskets in one trip over a mountain pass with a load of bucking bulls. The 6.0 had tons of power with a simple mod but it could not handle the extra power, blew the head gaskets and messed up a piston all in a week. I only put a straight pipe on my '05 6.0 and had no major engine problems, but it would suck the fuel with a big load! If it is a Ford I support it, I just happen to really like the 7.3's!