B body rear axle in an A body

I run a stock width '69 B-Body rear end with factory axles and 10'' drum brakes in my '74 Dart Sport.
All I had to do is move the spring perches in 1'' on each side.
The wheel and tire combo I use is a stock 15 X 6 1/2'' Mopar rally wheel with 255 60 - 15'' radial T/A tires.
Also, I use Super Stock 002/003 springs on it.
I rolled the inner wheel lips in but I didn't need to, It was done for safety's sake.
There is a good 1 1/2'' room between the tire and the spring as well.
I could easily run 275 width tires with the correct offset.