15x10 steel wheel with a 4 inch backspacing on a 69 valiant

autoxcuda said
No.

Not with any tire that would begin work with a 10" rim; 245 or wider.

Will need rear end narrowed to fit those rims with mini tub.

correct. I run 11.25" rims on mine with he mini tub but had a dana 60 made narrower than stock. I want to say 46"