gas kills those sight plugs. i tried them. when i went to pull the carb apart to clean it i went to unscrew them and they just snapped off. i couldnt see through them after a while anyway. i tired the proform body on a 750 vac with a metering block. i really felt i had the carb in optimum tune for the strip according to the numbers. i put that body on and picked up nothing. yet i threw on an 800 and a 950 hp and it really liked the bigger carbs. strange. they were double pumpers which helped bigtime in the 60' but even mph was up. that said, if im not hittign the track all the time, i keep the 750 on it. i had the best results with an annular carb but the worst mileage. they just dump the gas in.
