I found a stock 216 manifold. Freed up the flapper and installed it. The 216 model B Rochester is warped and runs like crap but does seem to fire all 6 cylinders. Going to put the 216 throttle body on a known good B from a 235 and try that.

Shouldn't that swap work for testing, Jerry?

~~ Jethro
1954 3100
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1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020