Rear end gearing

'72 Demon, glass hood and front bumper, 10pt cage,
440 .030 over, 11.5 comp, 590 solid cam , 850 cfm holley, tf with 4000 or 4500 stall , will have to look again its been a while
8 3/4 rear. Willwood rear disk brakes. Caltrac with old springs and 9 way Shocks. 325/50-15 , I think that's 27.8 tall.
Front factory disk brakes, adust able front shocks. I think it has the small block torsion bars.