Congrats on the 60ft. That's good going for a big car like that.
With a 29.5 tyre and a 4.56 gear, you must be turning in excess of 7000 rpm through the line.
Mick

69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36