b body rear end questions,a body rear upgrade

B body rear, drum to drum

'62-'63= 58 1/2" (And '64 Max Wedge)
'64 = 60 7/8" (Exc.Max Wedge)
'65-'67= 59 1/2"
'68-'70= 60 1/8"
'71-'74= 63"
'71-'73 wagon= 64 3/8"

A body rear, drum to drum

'66-'72= 57 1/8"

So, yeah, about 3" per side. That's going to be hard to deal with. You'd need like a 7 1/2" backspace rim. Or get it shortened to A body specs.
Yea ,i talked to Bassett custom wheels earlier. They make steel wheels with custom offset. 75-150 each depending on the style.
Although i did not anticipate it to be more than 6.
I will call them tomorrow with that question. I have the tire clearance figured out i think. Bill Deadman on here has a car like mine and his car has been raced. He is using b adjustable race shocks with some type of spring over them to stiffen it up. Ill get the specs when i get to that point.He is using a 67 b body rear though 8.75.
Also correct me if im wrong ,tire size May be an issue with the excessive back spacing ?