Welcome..
If you look around on the build threads in the truck year boards you will find people putting just about every imaginable GM powerplant into all years of trucks. LSx swaps are very popular for those with the cash to do them and there is a dedicated (obessive?) sub community that is convinced that the best powerplant of all time for a GM truck is a Cadilac mill.
I'm betting that you will find a wide range of product opportunities here.