The pulse port in the carb is the small hole in the base closest to the back cover..Some carbs use the pulse fitting in the cover and don't drill the hole through in the carb itself..Been using pulse fittings in the cases for years, with a 128-218 Walbro fuel fitting in the carb cover.Tap an 8-32 hole in the case or transfer port and use a DuBro brass fuel fitting.....That allows the carb to rotated with the shaft parallel to the cylinder, and no bell crank....Plug the pulse hole in the cylinder to keep any possible pulse leaks from happening...