Crank snout size issue

I've got a 65 Barracuda with a 65 273, automatic trans. I want to install a 72 318. 273's tired. Will I run into the Torque converter snout size issue? I think the pre 67s had a small snout, and the later larger?? is that true?

If so, is someone making an adapter ring for newer motors on the earlier TCs?

OR (question 2)....can I use the small snout TC from the cable 904 on a later slipyoke style 904 trans?

thanks