Need gear ratio , tire and rear end ratio experts ! Green Rat Project

At 2900 pounds, your 5.2M will probably like a starter gear in the range of 9 to 10, say 9.5

If your ratios really are; 4.02 - 2.32 - 1.40 - 1.00 - .73 (splits of .577-.603-.71-.71)
then 9.5/4.02= a rear gear of 2.36
Of course, in overdrive, this becomes .73 X 2.36 = 1.73, and with 26.5" tires this becomes 65=1440 rpm. Good luck tuning that for fuel economy, because I think it is as good as impossible to give the engine the timing it wants, using a stock-type mechanical distributor.Never mind that 2.36s have never been offered in a Mopar.

So then, lets flip it the other way.
2200 is about as low a cruise rpm, (at 65mph) as you can tune that distributor. With a .73od and the 26.5s again, this computes to a rear gear of 3.66; which I will round UP to 3.73s giving an actual 65mph=2250 , badaboom!.
But at the other end, this gear will get you a starter of 15/1, As others have said, this is Great for parading but not much else. That means that most of the time , you will be starting in Second which is a starter of 8.65. Ho-hum.

This trans was designed to work with the injected and computerized and beer-keg intake, and in a pick-up truck. The first two splits are way too wide for a 2900# car. There is no right rear gear for your application....... unless maybe, you just ignore First gear altogether, driving it as a 4-speed.
Then; 9.5/2.32Second=4.10 rear gear which is 2.94 in od; that's pretty good. 65=2465.... but with a 16.48 deep-Low, 1000rpm is 4.78mph........
The problem with this idea is that you have no decent gear to top out at 60mph with. Your choices are Second at 7240rpm, or Third at 4370 .... see what I mean?

IMO
At 2900 pounds, your combo is just right for the A833od 4-speed...with ratios of 3.09-1.67-1.00-.73od with nice progressive splits of .54-.60-.73
Using 4.10s, your starter is 12.68, and your cruiser is 65=2470, but the really big deal is this;
60mph in Second tops out at 5210,
just about right for a stock-cammed 5.2M .
Jus saying..........