I measured my stock rear end drum face to face with c-clamps and angle iron,got a hair over 57".Any body know what pre 70 b-body measures drum face to face? 67 Belvedere complete re inc. leaf springs $3oo guy says it will fit moving the perches.
What car are you putting it in? Springs probably won't work, but the rear will by moving the perches in. I put one in my Dart Sport and I'm running stock Rallye wheels.