Looking for a double roller for a slant 6

If you're putting a '68 or later slant-6 in front of a '67 or earlier automatic transmission, you will need to install the 1/8" annular spacer ring between the (small early) torque converter nose and the (large late) crankshaft rear flange counterbore, or you will quickly and repeatedly eat up transmission front pump bushings and seals.

Good info!

I think that I will be ok. I have a 66, and I believe 2 67 engines. I am also just going to use the original trans as it was a pushbutton. I do have a spare pushbutton trans freshly rebuilt (with heavy duty clutches and shift kit from reliable builder) with good converter on the side just in case. I'm saving it for the fresh "complete rebuild" engine.