1973-74 B-body vs 1973-76 A-body spindle

JGC403 said
The Guy on the chat on their website said that the Spindles and the upper control arms are 73-74 B-body.

He doesn't know what he is talking about. Forget them and just buy your stuff from Doctor Diff. At least Cass knows what he is talking about when it comes to Mopar brakes.