67 Valiant tire and wheel fitment

I am for sure planning on moving springs into the frame rail, already have the stuff. I think you answered my question for me.

Your rear end is about 56" WMS to WMS. Either axle I am contemplating using will be about 59".

It sounds like springs moved in, narrow the Explorer 8.8 to 56" and run 15x8 wheels with 5.5" BS should get there. The car is kinda rough, and I am a bit handy with a welder etc. so if I need to weld and move things that is ok.

Thank you, I will commence with the narrowing process on the 8.8.
Dude! If you're handy with a welder and going to go the spring pocket route (into the frame rails), mini-tub that bad boy, get 15X10 wheels and put 325s on it.
With an appropriately narrowed rear, of course.