Mike - Carter made hundreds of different YF carbs. Don't try to use a smog emission carb on your 216. I posted on this forum a few months ago the YF's which are applicable to the Chevrolet. Do a search on topics posted by carbking and Carter YF to find this topic.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop