What the heck is up with 8-3/4" rearends?

Thumperdart said
Do you need a 742 pumpkin w/a 30 spline spool and stock length a-body axles out of my 9-second Dart by chance?

No im good. This looks like this 66 Dart will be my last project car. And this is almost finished, just redoing things I think I can improve on. o and replacing a flat Camshaft.