Does anyone know what the diameter of the big hole that supports the bearing retainer is on what's PROBABLY from a 1959 Fairlane? 
I've got a 3 speed toploader in my Model A coupe behind a '59 292 and it's all working...I have another transmission with OD (AMC Gremlin T-150 with Laycock de Normanville OD) that I want to stick in there but would like to figure out if that bearing retainer is the right diameter as is or if it'll need to be turned down (while it's with the transmission guy) without taking it all apart in case I want to go out for a blast in it.