Me reving my 4.0L Diesel Engine 

The maximum torque occurs at a much lower RPM which is way better for towing and rock crawling.

ya its a chevy c14 and no it isnt the original engine....an 6 cilinder 4.1 GM engine was. later:)

you get more torque from lower revs if it doesnt rev high

Perkins in that pickup? Did they make them that way?

it doesn't rev very high does it?

It's a diesel.