this is the solenoid in pic on page 67-18 of the shop manual. I am told it advances the dist at high speeds. my original has the nipple broken off where the vac line is supposed to be. I think I have the carb number correct but it is for a 70 455 Stage 1 car. This solenoid may fit other carbs also. Anyone have a source for this part? Will appeciate any leads. Thanks, Ken Anderson