Talked to my transmission guy-------

If you put the money into a bigger engine, you probably wouldn't need the o/d; But I don't know your combo or your app..............so
Yes the A/T&o/d has been successfully done here several times. One fellow even wired the O/D to be used as a splitter. He couldn't rave enough about it.

A) The A500 set; 2.74-(1.89)-1.54-(1.06)-1.00-(.69), splits of;(.69)-.78-(.69)-.94-(.69) If you swapped in

B) the 2.45 set, 2.45-(1.69)-1.45-(1.0)/1.0-(.69) with splits of (.69)-.86-.69-(.69)

C) The A999GV; 2.74-(2.14)-1.54-(1.20)-1.00-(.78) with splits of (.78)-.72-(.78)-.86-(.78)

D) The A904GV; 2.45-(1.91)-1.45-(1.13)-1.00-(.78) with splits of (.78)-.76-(.78)-.88-(.78)

AS you can see the GV splits are superior in every way. So more money for sure, unless you have to pay someone to cut up your car and fabricate the mount and stuff. But those D) splits would be killer with the right combo. Imagine 6 useable gears, with a real tight 4-5 shift; thats about a 744rpm drop at 6200. That could make a fast teener all right. Or a 360 with a 2bbl cam.........