radiator size

I’m swapping a stock power, early 1st gen 6BT and an NV4500 into a 1998 Chevy K2500. I’ll be running the Cummins mechanical fan. The truck currently has a 350/4l80e with towing package. I don’t do any towing but I do live in Texas (very hot). Is there a general rule of thumb for surface area or...

I'm working on installing the cooling system in a TJ-8 (sort of) and trying to fit the biggest intercooler and smallest radiator that I can get away with in order to provide room for the intercooler plumbing. I've spent hours going through all of the threads on here that have anything to do...