Overdrive options

Wow! 30s and a 3.73. Congrats on making that work.
approx. 700 h.p., 727, dana 60, 35-3800 convertor, 295 65 15 d. radials, approx. 3100 lbs., very docile till u stick ur foot in it. "Does like gasoline", even w/ the fuel inj. Would love to have a g.v. overdrive! Retired, guess I`ll have to get a part time job to afford one. LOL