3500HD Swap Questions

durallymax

New member
Apr 26, 2008
2,756
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Under The Hood
I think the 454 in our 98 3500HD is getting tired. Very tired.

Looking at putting an old 12 valve into it with a 5 spd manual.

OH NO i know, no dmax here, dont think id be able to get the boss to swing that kind of coin, theres at least 3 parked outside everyday anyways.

I know these trucks were a class of their own, completely different animals, but are their motor mounts the same or similar, say if i bought a set of pre made chevy-cummins motor mounts from auto world, would they work? or not?

Thats really the only difference i guess, because electrically things are simlar and I know I would be having to change driveshaft lengths and such.

Just spitballing ideas here, didnt pay much for the truck, the motor is just a complete pooch and it getting tired i think. But the chassis of these trucks is too good to waste.

Thanks.
 

SmokeShow

Well-known member
Nov 30, 2006
6,818
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Lawrenceburg, KY
Scott at tndieselconversions may know? He's very knowledgable on the chevy-cummins conversions.

He's quite active at 4btswaps.com. That's where I usually find him the most. That site is a good reference for any cummins swap in general. I'd snoop around over there if I were you. ;)