Since rebuilding the head on my 53 with a 216, the truck has run near perfect. Fun to drive again. Was running well one day, then wham, starts to run like crap. I’ve probably put 200 miles on the head. It’s got dual Zenith’s and the distributor has been upgraded (no points). Idles great, took great pains to make sure both carbs are set the same. Float level spot on. Floats good. Takes off from a stop with good acceleration but starts to blubber around half way through RPM range. Checked compression…85-90. Valves were almost spot on as well. I bought it restored 10 years ago. Not familiar with that style of distributor and to be honest, not that knowledgeable in setting the timing or vacuum advance. Should you be able to twist the distributor or slide the vacuum advance ? I can’t get anything to move. Not sure which path to go down now. Any advice would be certainly appreciated.. Thanks in advance.
