HEH T where is the R?

For those with a HEH T tranny is reverse left up or down. I have an 8 ball on my shifter (which is going in the trash) and my tranny is in the shop.

Sept 28 64 car with 64 style shifter.

I am assuming up but thought I would ask as I am going to a parts store tomorrow (out of the way) and want to get the correct one.

Thanks! R down it is.