A833 NP A body trans ID help & intro.

Well; it's not an overdrive, so should be a regular 2.66-1.92-1.40-1.00 box
I had my tenth birthday in summer of 63; yur old,lol. I started wrenching in in 68/69 still in highschool.
Welcome to the mayhem.

Your Twister 318 is gonna feel the loss of first gear torque multiplication, but the next two gears will more than make up for it.