if its not an aluminum drum a band from your local trans parts supplier will be fine, rear band is only on when in rev or it is holding in manual if the vb has low band apply.

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4