Had a GV in my 69 Super Bee. All I had to do was dimple the tunnel for clearance for the two studs on the top rear of the housing. Had it behind a 512 stroker and never had any issues. I liked the GV because you can select overdrive in any gear. Use to wind it out in second then select overdrive, wind it out again then shift to third. drive I had a reverse manual valve body in it.