Yes as Alvin posted. The 1/2 ton's are more marketable than the
3/4 ton trucks simply because the rear suspension and drive
line parts are harder to find.
If the drive line has a center driveshaft support and an open
drive shaft from the support on back then it's a 3600. the
frame is also heavier in the 3/4 ton and at the rear
it's "narrower" than the 1/2 ton. Yes I said the frame at the
rear is narrower on the 3/4 ton than the 1/2 ton.
If you're thinking of trying to turn a 3100 into a 3600 then
what you will end up with is an abortion that will be worth
less than either one of them.
If it's a 1/2 ton that you want then keep looking till you find
one.
Denny Graham
Sandwich, IL
Last edited by Denny Graham; 01/30/2013 4:55 PM.