Ok..... now I understand. I thought 5 or 6 lug was an option of some sort
back in the early '50s for trucks. If they were all 6 lug, no sense chasing
that path.

Looks like the best option for me is to change the whole rear axel assembly.
If I get a diff with and open drive line, can it somehow be mated the
my stock four speed?

The whole reason I want 5 lug is to be able to put Cragar type mags on the truck.
While the rest will be bone stock, I kinda like the look of fancy wheels. Used
Cragar's are plentiful and reasonably priced.

Thanks for your help and advice Bill, JiMerit and Steve H.
Jerry

1 1951 Chev Panel with a 350 small block, automatic tranny.
1 2004 Chev 2500 HD pickup... stock
1 1950 Chev 5 window pickup; 261 c.i. engine, 4 on the floor.

With lots of time and money, any Stovebolt can be restored.