Here's a half ton...

Hennessey? SMH that people still do business with them

first. are both rear axles powered? or is one just a tag axle?
and no matter what you do to the truck. the max weight was set at the chevy factory.
or did they build this one up from raw metal? aka a custom one off that might not pass safety standards. as ten of these trucks must be given in to destruction to prove if safe to drive.