upper_tanker
I'm Awesome
As far as I know, these trucks (8-lug 2500) with 4.10 gears and a 454 are rated for 10K LBs towing. The only differences I'm aware of on a 350 truck vs a 454 truck are that a 454 truck gets a 10.5" 14-bolt full floater rear axle and the 350 has a 9.5 semi float rear axle. Maybe springs are different but that should be it. Worst case senario, diff swap it to a 14ff (I did because I had one) and you should be good to go. These trucks could use better brakes but if your frame and stuff is in good shape it should be fine structurally. Agreed with all the "get a temp gauge and a bigger cooler/fan" comments but other than that these trucks are solid.
I'm glad that you posted this. Out of my dads GMT400 fleet, only one of his trucks has a full floater rear end, and it's the only one with a 454 vs a 350. I always wondered what constituted the FF vs the SF that all of the otehrs had. I didn't think the engine would make a difference in rear end, but I guess that makes sense for towing capacity.