I think I've got a nice comparison.
My car is a '67 Belvedere, probably pretty close on weight.

10.4:1 505”. E'brock heads, 0.587/0.593 287/294 cam, M1 intake and 1050 Dominator. Mopar 175K converter (~2800RPM) and 3.55 rear end, and 8 year old firestone 205/70/14 street tires.

12.54 @ 114 w/ 1.932 60'

With converter, tires and gear, it should go nicely into the 11's.