They say I say
Quick fuel 650 Q-series carb with billet metering blocks.Bought some standard holley power valve to swap sizes.Had plenty lying around but want new in the package ones.Tried to put one in and it wouldn't screw in,got three of the ones I had tried them in both metering blocks and they wouldn't go,picked up the ones that came out and they went right in,tried the new ones again and it was a nope.Called QFT and they said even though they were "4 window" the standard ones should work.Tried again a little forceful by hand and it will not go and I refuse to risk ruining a metering block over that,the only one that sells QFT locally didn't have the size I needed.