All ActivityMost RecentMost LikesSolutionsRe: Increased power for Chevy 3500 Class CSome sage advice here! I'll forget about swapping for the big block. As some of you have suggested, what I find annoying is having to run at high revs to climb steep grades. I suppose building up the 350 won't really let me climb grades at significantly lower rpms - that would require more low end power, which one generally gets from greater displacement. That's what I hoped to get with the 454. Stroking from 350 to 383 or so might help some, but I'm not sure it would be worth the cost. Maybe I'll just look up the power curve for my engine and get a tach to ensure that I'm running at the best rpms on the climbs (shifting manually, of course, which I already do). Oh, and I'll feed the squirrels that run alongside, as suggested.Increased power for Chevy 3500 Class CWe recently bought a 1999 20' Chateau on a Chevy 3500 cutaway chassis. We love everything about this RV. Just took it on a month-long trip out west and everything works as it should. The engine is a 350 and runs perfectly. Only problem: after moving down from a 35' so we wouldn't have to tow a toad, I would still like to tow or 1989 Wrangler on occasion. The 350 just doesn't have enough power for this. We towed a 22' pontoon boat (just under 3000# w/ trailer) from the factory to home and the RV struggled on the upgrades. I don't want to strain it with the Jeep. I noticed in the owner's manual for the chassis that the Chevy 3500 came with an optional 454. How hard would the swap be? I would want a rebuilt engine and transmission, but should I also find a donor vehicle for all the peripherals? Would the donor have to be a 3500 van? Any recommendations on a shop to do the swap (preferably on the East Coast)?