AN 8.3L cummin's would do you fine. . .I;m a cummins fan Even I would say the 4700 or 4900 IHC twith the DT-466 backed with the spicer 7 spd is about unstoppable in pulling power and relaibility. . . .
I had 2 4700's and 4900 tandum. . .
Best dump truck's I ever ran way better than Ford,Dodge and Chevy's cobbled together GAS engined gutless wounder's. . .
tho the IHC dumper's with the 345's and 392's even out worked the BIG THREE! a bit slow tho. . .

anywho I think the 466 IHC or the 8.3L cummins either will do you fine if you get the budget the C-7 cat is a great little work horse i'm told as long as they will fit under your cab. . .

basicly your putting a new truck under your old one ? or just a moderen power plant in an OLD cab/chassie ?

Mike


1962 GMC K3000, GMC-379 V6.