Holley/Demon Carb stumble

Cudafever said
Hmm
well i really did.
I did because when i called holley about doing this they say point blank that they had no idea if it would work on a BG/ demon car and click end of discussion.

so i was vary careful with matching the demon gasket with the gasket that came with proform. no differance.
In fact the only thing that that i notes was when i replaced the main venture. the proform didn't have the power valve drilled out for the secondaries power valve. that main body/venturis can be bolted on either way but the power valve would Not work if you put it on wrong. the demon didn't matter which way you installed it.

Not saying your wrong and sure could have overlooked something as well.
Thanks for your response.

They are not the same. I wish Holley would of never bought Demon out. Read tech tip #1
http://corvette-restoration.com/wp-content/uploads/technical_papers/BG_Carb_Setup.pdf
Tech Tip #1 BG carbs use mostly the same gaskets as a Holley. However, the throttle plate gasket (the gasket between the bottom throttle plate and the upper body of the carb) on a BG has 4 idle fuel transfer holes that are not in the same location as the Holley. If you use a Holley gasket, you will not get any fuel flow through the idle metering circuit on the BG, and the idle mixture screws will not work. You can use the Holley gasket, but you need to slot the idle fuel transfer holes in the gasket to match the holes in the BG carb.