This fits 72 and later Quadrajet. 1" x 20 threads with 1" nut. Fuel fitting threads are 5/8 x 18.
This style had the thin nut section.
Original used inlet housing for long filter. This used item will have blemishes and marks as it has been in use for the past 50 years. These original inlets may help a stubborn carb seal better. It is also perfect for the proper restoration.
We do offer plating for additional cost.