Got a 72 GS 4 speed with 350. Now the ass. Man says shaft pt# 7810904 with M20 trans === Has a Red strip 54.429" long C/L to C/L My cars are 53.75" long. with M21 The yokes are 4 speed # 789762 and TH 400 auto is # 7801551 .. I thought the 4 spd and 400 yokes were the same. they did not come with M20 did they? Could i get some feed back on what every one has for drive train ? Engine - Trans -- Rear --- That would help every one i think.
The 71 up fine spline trans is slightly longer than the 70, and also has the same yoke as TH400. 70 coarse spline trans does not.
72 parts manual The yokes are 4 speed # 789762 and TH 400 auto is # 7801551 .. I thought they were the same and still do. 71-74