Have you considered changing from two I bbl carbs to a pair of 1974 ford pinto Holley/weber 5200 carbs (using adapters for your intake). They run pretty good around town. I ran that set up for a good many years on a 235 motor and a weiand 2x1 before I moved up to the cliford 2x2 and 38 mm webers for the 261 motor.
as for the 216/early 235 vs later 235, the bottom of the intakes for the earlier motors were flat while the later motors had an angle to them which is why there may be a difference. I have two weiand intakes, one meant for the early 235 and one later. the pads to attach the exhaust manifolds are different.
Last edited by Dragsix; 02/22/2018 7:46 PM.