Squeaking Sound Coming from 225 /6

pishta said
cheap. DIY as the wear part are all here.
NORS Melling MoPar 1960-1966 Dodge Dart Plymouth Valiant oil pump REPAIR KIT | eBay

As a matter of info. There are three different rotor sizes (thickness) for the slant six.
5/8 inch early factory pump
7/8 inch aftermarket replacement pumps, and (I think) the factory 1981 up hydraulic lifter engines
1 1/8 Melling and MP high volume pump (not recommended to use).

Oil pump info - Slant Six Forum