The Intake 250b/c - 400b/c assembly is constructed from several parts from which the Joint, Carburetor is the most expensive.
Check out any of the twenty-four Intake 250b/c - 400b/c components enlisted.
The most reasonably priced component used on the Dt400 1975 Usa Intake 250b/c - 400b/c is the Washer(6a1).