Commercial rebuilding of the old pumps is almost history. It's easier for FLAPS to sell the new replacement pumps.
Less failure returns. If you want original, you may have to pay $$$ for a specialized pump rebuild service or
rebuild yourself however you need kits that are compatible if you plan to use today's Ethanol gasoline.
Even NOS 1970's Carter and AC pumps have diaphragms that may react with Ethanol and fail.
Ethanol safe kits are available for some AC pumps but there are none, as far as I know, available for Carter.
Below is a work-in-progress subject to errors:
Carter replacement pumps:
M751 = 1937-51, single action
M2118 = 1952-57, single action
M2430 = 1952-57, dual action
Chevrolet original pumps by AC:
AC 429 = 1937-51, single action, GM 1523089, glass fuel bowl
AC 9126 = 1942-51, dual action, GM 5591547
AC 9803 = 1942-52 (first design), single action, GM 5592626
AC 9832 = 1935-54 & 55 1st, single action, angle output, GM 5592627, glass fuel bowl
AC 9798 = 1935-54 & 55 1st, single action, angle output, GM 5592627
AC 9797 = 1952-54 (second design) & 1955 1st, dual action, GM 5592675
* Beginning 1952, the pressure increased by a 1/2 psi.
* On 1952 cars, the motor mounts changed to side mount. The pump in and out positions were changed to clear the mount.
* In 1952 the length of the cam arm changed.
* 1953 Service Bulletin says the current model fuel pump, 5592627, can be used on 1937-51 models. The fuel line has to be bent to fit.
