mroeschlein
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- Aug 1, 2014
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As others have stated, make sure the 4L80E is solid (maybe look at a shift kit, etc if you want, but not necessary) but then what I did on my 'burb was to build a 383 to take the place of the 350. I know it won't do 510 lb-ft of torque but mine is over 400 and pulling a 6000 lb camper it has no issues at all, where the 350 would DO it but not happily. I built the engine myself and it cost me around $3,000 to do. Crate motor version (HT383 from GM) is around $5,000 I think but you get the warranty too. Would be pretty much plug and play vs all the changes you'll need for the 502.