Actually I have. I probably did it before any of you guys in fact. About 1990. My uncle and I put a 305 from a 7? Nova in it. There weren't any kits back then, and we did everything from scratch. In a 1982 LWB white work truck with dog dishes and AM JAM.
It was fun. It was fast. It was super dangerous and handled like a greased pig. It was annoyingly hard to work on and he spent many hours maintaining it and improving it. He spent thousands on the truck. In 1990 no less. Just to get it to a poine where it wasn't a deathtrap went beyond, a running gear, radiator and some fluids. Remember, this 1990 and was an 8 year old truck in 1990 when we built it. The suspension was SHOT. At the very least, I'd never blindly recommend someone to "drop in a v8" on a now 30+ year old truck without asking them some important questions. . Especially not knowing anything about the driver, the truck's condition, etc, or plans for his build. I mean...come on dude. You know it and I know it. We all see hacked up, clapped out, garbage S-10 V8 swaps all the time on Marketplace in trucks that didn't have any business on the road with the stock running gear, let alone a powerful V8 the truck wasn't designed for in stock form. That is if they ever got completed at all.
Like a said, that is irresponsible advice.