69 C30 ??auto tranny/no park??

[kursed]

I've got a 1969 C30 dually with the original 292 six and an automatic. My question is what kind of tranny is the auto. It's just like a th350 minus one thing. There's NO PARK. as in never was. ??? no park on the column indicator, or tranny, only goes to reverse, and there's a little parking break off to the left of the column on the dash, lever style. I'm assuming the park break is an aftermarket or dealer add on because there is a foot e-brake in the floor. Anyone have any clues?