The fuel pump for the 361-383-400-413-440 is physically interchangeable. The mounting pad is the same, the pushrod is the same, the pump itself can interchange. The inlet and outlet positions on the pump itself may be different, and the " style " of the pump may be different between an older pump that is rebuildable and has the bolted together pump housings versus the newer crimped housings that arent rebuildable. Just a fwiw, obviously a later crimped pump wouldnt be " correct" for a concours situation, but if it means the difference between driving and towing, its good to know. Mikey 62 Crown Coupe