Bill, that looks like Fun !
I have not replaced trans gears, myself, but from what I've heard from a number of guys, it's the gear timing that's tuff. Your picture shows you don't have all the gears in yet. What ratios are you going to and what did you take out ?
We just came back from racing JF Heritage in Salt Lake City [ 4400', 6900' DA] where we took out our 1.68 and installed our spare trans with a 1.76. Also installed a looser converter and one size smaller nozzles. We got rained/ hailed-out just as we getting ready to race our final round against Scott Parks.
The track changed the fixed brackets because of the Alt, ie, NE-1 [ 7.60] was changed to 8.00, and NE-2 [ 8.60] was changed to 9.00. The 7.0 Pro was not changed per the racers suggestion, they just changed pulley's and run 7.0's.
Frank Parks said JF adjustment is not 4 tenths, more like 3.5. So our best 7.38 would be like 7.03 at Bakersfield, but Scott's 7.15 would look like 6.8, which he ran at the March Meet, 6.81. Group One [ A/FD, JF, 7.0] will finish their final rounds in Q-2 at the CHRR in Oct, Funny car at Boise, and Group two [ NE-1 and slower] in Bakersfield in Sept.
Good Luck and have FUN !
Jon