Internet Listings --- WRONG WRONG WRONG......
DO NOT touch either one of them.... Pieces of your camshaft will appear as chunks in you oil pan....
An M3672 Carter is 1964 - 1968 383 & 440 ONLY ---
NEVER any 426........
A 6866 Fuel Pump is 1964 - 1972 SMALL Block --
273, 318, 340 ONLY ---
Certainly NEVER any 426....
The 426 HEMI Fuel Pump has been --- Obsolete ---
By every brand for decades....
You can Only find N.O.S. (generally for huge bucks)
Every Now and then.... Or if yours is the rebuildable style, I can supply you with a fuel pump kit, engineered with ethanol - gas compatible material....
Always best to simply call me --- Craig ---
516 - 485 - 1935...... New York....