I had an aftermarket 700r4 with 2500 stall in my chevy ll @ 350rwhp and a 150 shot. The car was a street car that got some track time. Shifts were firm and the trans was pretty good except having to replace clutch packs once a year. I feel I was lucky. One thing I did not like was the gear spread from 1st to 2nd.
I have a 4l80e now in the car with a 383 and a T76 turbo. The set up will make 900fwhp. The 700r4 would have pucked its guts with this set up. The gear spread is better, as the 4l80e is like the turbo 400 spread. I am running the TCI controller and can set shift points by MPH in any gear. I can set WOT shift points and never have to shift manually.
I am concerned your trans man can even compare the 700r4 to a 4l80e. If you make over 500hp and want overdrive the 4L80E is the chioce.
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67 Chevy ll
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