If it is a "numbers matching national show truck" Carter W-1 684s.

If it is an almost "numbers matching show truck" for local and regional shows, the Carter W-1 574s (1948) is almost as good, and a lot cheaper. And 99 out of 100 lookers won't be able to tell the difference.

A YF designed for a 216 is also an excellent choice, provided you live where you can buy real gasoline (no deathanol).

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