[valiant67]

The factory offered a 9.25" rear axle in these trucks, though most were 8.25". A 9.25" should hold up just fine for what you need, though these axles weren't built as well in the 90's as they were before.

 

[TWX]

Every time I hear of someone saying they traded a Caddy, I think of The Blues Brothers...

 

[leesmoneypit]

lol twx

 

[leesmoneypit]

I think I will stay with a 5.9 and use $ instead of big problems of hemi swap now will a nv3550 bolt in place of nv3500? looking at 408 and 300 350hp to the ground and for now does anyone know were I can find used 3500, Ive found one for $800 in my state with 124k on it, good deal? or rip off? Thank You for any help

 

[TWX]

I don't know much about the transmissions, but swapping the engine should be very straightforward. One of the motor mounts is different but should be available, and of course the external balance so I guess the flywheel will need to come from the application for the motor, as well as the harmonic balancer.