Please help with Tire offset

george joseph reid said
Mine is a 68 -70 housing and the 66-67 are a wee bit narrower, Spring perches I cant remember off the top of my head but should be close for an A-body. If not just move them. All of this is in a sticky some where.

Yessir, maybe in the drivetrain section? Or axle and rear end? I know I had about 30 years ago, but I definitely seen it posted here in the last week!