340 Intake Manifold Casting# 2531915 - Upgrade

I am dragging this thread up from the grave only because I got the year wrong when I made the first post. John's car is a 1966 Signet, not a 1967.

Still trying to find him a Mopar M1 Dual Plane since he insist it have a choke well. He likes the choke on the AVS. (Cranky Old Guys)

Tom
66 and 67 take the same intake. 66 had a 273 and so did the 67. Without looking back through 2 pages of posts, what engine is he running?