I am gathering parts for a TPI conversion and I have questions about the gas tank and pump after searching these forums. I understand that a TPI pump will fit in a TBI sending unit and I think I've even heard that the whole TPI sending unit will fit in a TBI tank. However, I have a carb tank (1985). Can I just get the sending unit from a TBI truck and drop that into my tank or will I need a different tank? I like this idea because the sending unit will include a return line. Has anybody had any bad experiences with an in-line pump mounted to the frame? Thanks for helping me figure out my options.