Hotrodestude; That manual 3 speed have Reverse where 1st normally is, and 1st where
2nd normally is. I had that same trany in my 67 Mustang Coupe for a while with a B&M shifter that was spring loaded to push it to the right so it would go right in to 2nd when I pushed it forward while speed shifting. I finally put in a FMX automatic after it started hanging up on the floor. That Mexican Style Boss made to much power and started twisting everything up. So I put in subframe connecters, then I ripped a chain right out of the frame and broke the motor and trany mounts. Fun, fun. And I was only running a little Erson cam called a TQ30. That car was a blast, good times for sure. Kurt