What say you !?!?!

Well, there are 4 possibles.

3/8" fine RH thread & 3/8" coarse LH thread & both versions came with either the smooth ball with H pattern or the pebble grain ball with no pattern at all.

That seems to run true for A, B & E-bodies with D13.

So take a look at the threads on your shifter handle to see what the thread type is to start.