[1970 C10 MJW]

Yes a new pump can be installed. I put the equivalent of a whalbro (or however it's spelled) 255lph in the factory plastic pump housing. Idk bout short beds but long bed took me relocating the rear most frame bracket where the taillight bracket attaches (if I remember correctly) there is a guy on here that did a big write up on how he mounted it. Mine has worked out fairly well.