What Could/should It Run???

A buddy of mine had a 72 Duster that ran 12.58 - 12.67 the only time he took it to the track.
360 + .030 9.8 compression
509 hyd. cam
J heads with mild port and 1.5 rockers
Holley Strip Dominator intake w/750 DP.
1 5/8 headers
8 1/4 w/ 3:92 gears, not sure about the tire size. S/S springs
904 w/3500 convertor