Sounds like we are blowing through the converter here, RPM drop is around 600rpm according to the race pack. Stall has increased from 5200 to a tickle over 6000 since we swapped gears from a 4:10 to a 3.73. What do you think ? Ran a 9.80, just under 139, currently fitted with a 8" ATi treemaster that was originally specified for a 750hp 528, we were happy with it until we changed the gear  https://www.youtube.com/watch?v=7mEWmd1L_GM
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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