Rear end advice?!!

:scratch:Need advice! building a 65 V200 Valiant and am having trouble locating an 8 3/4 rear end. My stock rear end measures 53.20" flange to flange, and a spring centerline of 43.02". I'm looking to purchase a donor car so I can also use the front disc setup as well as the rear end. Does anyone know what make and model I need to be on the hunt for? maybe a site or manual that will list interchangeable parts ? Thanks