Here is the scoop trying to decide which way to go on the next gear. Here is the current combo
3000 lbs. 71 duster
454 ci small block mopar
powerglide 1.80 first gear
8 inch converter 5300 stall
4.56 Rear gear
14x32 tire with a 105 roll out
1050 dominator
crosses at 6500 Rpm
H.P. according to dyno sheet
633 h.p. at a low 5700 rpm
650 ft. lbs torque @ 4600 rpm
Shift ay 6500 rpm

Ran
1.41 60 ft
4.11 330ft
6.41 1/8 th
8.40 1000ft
10.11 1/4
131.43 mph

Since I broke the case on the glide thinking about changing the 1.80 gear set to a 2.08 or 2.11 while its down in hopes of picking up the 60 ft.

This engine is difficult to run due to its unusual power band. Any suggestion moparts. Is this a good move or should I go up on the rear end gear?

http://www.youtube.com/watch?v=QQZQsoXCpvA