Your thinking of a p7100 2nd gen cummins. This is a 1st gen with a VE pump and I could be wrong, but I believe this is a non intercooled model. You don’t really get all that much extra power out these without injectors and or turbos. Plus the auto trans is really marginal at best. If it were mine and I didn’t want to dump a ton of cash into the truck and still use it to tow I would leave it alone other then the 4" exhaust.