Quickfuel was formed by some ex Holley engineers and is based out of Bowling Green, Ky which is also the home of Holley.
Proform is part of Speciality Autoparts, USA and is based out of Warren, Michigan and appears to be more a marketing company with a wide variety of products. It definitely uses the Quickfuel carb body, and, I suspect more parts in their carbs. I have never been able to confirm that QF has any ownership in Proform/Speciality Autoparts, but, the carbs are very similar. Some profess to believe that the QF carbs are more carefully assembled and more apt to work properly right out of the box, but I don't know if that can be believed or is just wistful thinking
Being that QFT was originally formed as a carb tuning company and then evolved into building them, it may well be that their seed money came from Speciality Autoparts?
I also read that a Holley division took Barry Grant over. BG is certainly pushing some new concept carbs these days, but, like many, I wonder if they will work.
One thing is for sure. Holley has been trying to come up with similar developments to their carbs to match the various start up companies that came from ex Holley people.
