My MF14's all have fuel pumps and the tank is higher than the carb, the Cub cadets don't have them and the tank is higher than the carb. I personally would put it back like it came, Mikes one of those guys that always has parts left over, know what I mean, lol. I just think that a restoration/repair should include putting all the pieces back on the tractor and engine. Theres a lot of pieces you could leave off, show no attention to detail, heck there might actually be a reason for the fuel pump, I'm not one of those guys that think I'm smarter than the engineer/designers.
Would have to ask the op what his preference would be on whether he wants to build it to original or bypass it. I think it is fine bypassing it even if you are doing a restore. One less thing to worry about too.