early a body 4speed question

If it has the companion flange it is a 1964 or 1965 trans. The A-body trans will have the shifter mount lugs on the rear (behind the trans mount) of the tail housing and a short tail shaft. All of these early ( with companion flange ) A-body trans had 3.09 first gears,1.92 second,1.40 third, and 1to1 fourth. Sorry I can't tell you what car it came out of by the casting number.