Transmission shift pattern?

[jmcfarland67]

Hello anyone who's reading this. This is my first post. I have a 67 step with the original 327. I bought the truck a little over a year ago and am now just gettin into restoring it. My question is, the tranny is a 4 speed, that is geared pretty low, and has a shift pattern i've never seen before on a gm of this vintage. r 1 3 Does anyone have any insight into what kind of tranny this is or 2 4 why it has this shift pattern? Thx