The cheap and eay way to put discs on is to use the 73 and up F/M/J/B/R body spindle.

Same height as my 64 300's drum spindle. Same ball joint tapers. Only thing I had to mod was shortening the tie rods themselves. Evrything bolted in.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.