I run 35’s with 4:10’s with a TH350 trans and no overdrive, puts me at approximately 2200 rpm @ 55 mph.
With overdrive you would probably have a problem staying in overdrive at hwy speed and would be better with 4:56 gears if you plan on staying with the 35 tire which is actually closer to 34 when doing your calculations.
Lots of info on this topic on the WWW.
IMHO