73 Duster build named Fred

-Boosted- said
Hmm.... maybe this one.

Basic Operating RPM Range:
4,500-7,500
Duration at 050 inch Lift:
269 int./276 exh.
Advertised Duration:
302 int./309 exh.
Valve Lift with 1.5 Rocker Arm Ratio:
0.654 int./0.655 exh.
Lobe Separation (degrees):
106

Tighter lobe sep, and little less duration than the previous one you posted, should be torquey. And probably an upgrade from your current one. Time will tell.