used pricing?

okay guys so input bearing retainer measure 4 3/8", i pulled the side cover off the transmission and did some gear counting. I came up with gear count like so

25-29-34-35
30-26-23-17

if i did the gear calculations properly that give me a 1:1, 1.34:1, 1.77:1, and a 2.47:1

Slant six org state "1970 T/A & AAR 340s 2.47:1 - 1.77:1 - 1.34:1 - 1:1, = 1970 thru 1974 high performance"

I think this is what I have. Any input? Good street strip unit? Decent unit to stick behind a 440?