Replacing ‘67 273 with a ‘78 318 questions

Adapter/bushing looks like this...T-Flyte Patty use to sell them, but he's out of business now...
View attachment 1715403648

...and if the new engine has a cast crank, you'll need a B+M weighted flexplate to use with the old trans.
FWIW..... All 318's are cast cranks (except for some of the early forged truck cranks) and all 318's are internally balanced. So no external balanced flexplate or TC for any 318.

Good pic of the ring! Tnx.