I've sprayed almost a whole can of carb cleaner around the carb and intake and I can't tell much difference in the way the engine sounds or looks. Having said that something tells me I'm not going to get this engine to run right until I put the 235 intake and exhaust manifold back on it. Trying to run this engine with a mismatched set of intake parts - 235 carb on a 216 manifold on a 235 engine - does not seem to be working. I wished I would have never tried to put a newer 235 in this '41 pick-up; I should have just fixed up the 216 that was in it and been done with it.