[Ardun]

Your gear ratio will be fine with an AOD.

I am putting in an '91 AOD in my '53 soon which has a modified flathead. With my 3.90 rearend, (this car originally had a 6 cyl with a standard 3 speed) an AOD, (.67 final ratio in OD,) & 28" tires I will turn 2085 RPMS. I did put in an original 53 OD and it works just turns the engine a tiny bit faster as the aod final ratio is .67. I will use a 2200 stall speed torque converter. I should do pretty good price wise by the time I sell the current OD and all parts needed to install it in a V8.


I will use Speedway adapter and '53 auto column which I have. Also will keep the stock 3.90 rearend for now.

When done, my wife will also have a driver.

Please let me know how you progress.