Ford 8.8! Will it work in a 74 scamp

The explorer axle is about 5" wider than the A body axle.

The Exploder rear is only 2" wide than a stock A-body. It will work, but may need a lot of backspacing on the wheels. You will be better off cutting the longer side axle down to the same length as the shorter side. Then you will be just a hair slimmer than a stock A-body. It is a good swap, cheap and readily available parts.