The 65 spindles are for an independent suspension system. No way they're going to fit on a straight axle. Your best bet will probably be to adapt a later model 1/2 ton front crossmember from an early 70's pickup and eliminate the straight axle. The crossmember and the relay rod will need to be narrowed about 2" and a suitable mounting point for the idler arm and steering gear will have to be fabricated. Front disc brakes can be adapted easily to that setup. Just don't try to use an IFS designed for a subcompact car like an M2 on a full-grown truck. That's sending a boy to do a man's job.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!