Drag Race Advice Needed

I have run 4.56, 4.11, and 3.91s in my 440 62 savoy, and the car didn't care, it ran the same. As a result, I would lean toward 3.91s, especially with a 512.
727 (no brake. Agree, a brake with an 8 3/4 is pushing your luck), B&M pro ratchet, reverse manual body is what I use too. Good choice, in my opinion.
Not, however, a fan of TCI. It's not for nothing their nickname is Total Crap Inside.
With good cylinder heads (get the biggest/best you can afford for a 512) and your car weight, 10s should be no problem.
And you don't need the weight of a full cage til you are in the nines. Unless the cage is already there, I'd put in a 8-point bar.
For slicks, as big as will fit, and I'd shoot for 4500 stall. Get one from a Quality converter shop, but it won't be cheap. (A good custom converter for my application moved my car from mid 6.50s to low 6.30s, with a brake in a light car, however).
And I just turned 70, you've got lots of time to go fast yet.
Thank you 33IMP; The 8 point simple roll cage has already been built, and I have good subframe connectors welded in. Maybe I jumped the gun a little. You are the third person with the same opinion on TCI. Nice to know. Cope is near me here, so I'll start with them. Glad you said the 727 is best. Nice to stay with Dodge throughout. I can fit 10.5" wide at 28.5 tall slicks. B&M Pro Ratchet is now on it's way, car is painted, and I'll freshen up the 3.91's I already have (thanks for that advice).

You're a very young 70. That's great to hear. I'm afraid I might not see 70. I had an artificial heart pump (LVAD) in 2013, and a transplant in 2016. I'm not overweight and was in good shape. Blot clot reached a bad spot in my heart. The anti-rejection drugs caused me to pass out, and I hit my head on the floor and cause a severe brain injury. Learned to talk and walk again, and was back to work in 2018. Very frustrating concentration and comprehension issues, so I appreciate FABO's help with my project. Life expectancy is 13 years, and I'm at year 6 already. But I'm praying for miracles, and loving the fun of building another car. Whenever the time comes, I'll go out swinging.