Holley 1920 rebuild kits?

GP Sorensen 96-191B 15 bucks autozone. Looked up 67 dart and they had 2 in stock! says "juego jiffy" on the label....Made in USA. and 533BS em10 on the box inside. comes with 2 diaphragms; 1 Accelerator pump arm has the hook style end squared off and the other looks identical but has a rounder hooked end, maybe different length but I hav not opened it yet. comes with bowl gasket, economizer rubber dealy with a spring on it, brass inlet, intake gasket (2 thick and thin) couple small round stamped gaskets and a rubber umbrella style rubber thing. Ill probably know what these all do once I dive into it tonight.