Quote:
Originally Posted by FED 387
By the way I believe it is a 7/8-20 size---Not a 1-20---Comp 387
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All Edelbrock carbs and 74-89 OEM carbs use 1" X 20 thread.
A simple fix is to drill and tap your factory inlet housing to 3/8" pipe. With a good drill press and a sharp tap it won't take you more than 10 minutes. Then you can use a very common AN to pipe adapter.