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Hi all, where are you guys buying these little buggers? The results I'm getting on the googlenet seem to just be for jets & air bleeds, and no info on the Holley site (big surprise huh)..if all else fails I know I can go the blank set-screw route, but the factory ones in this carb have a head...

(Ya know, for us pee-ons that can't get a factory made setup...!) Thanks!!

Just wanted to share some personal experience, as I have seen this question come up many times. Take with as many grains of salt as you wish.... I've been running a 1" 4-hole phenolic spacer on my 440. It's 9.5ish/10 to 1 compression, auto trans, RPM heads, 850 speed demon mech. carb, XE274...

Hi guys, I'm running an 850/mech secondary carb on my 440..and it works great but I always seem to be rich at idle(750 rpm). (DISCLAIMER=doing it old school for now, no A/F meter:() Anyways I can clean the idle up by going in a little on the 4-corner adjustment. However, this causes a loss of...

Just thought I'd throw this info out there...Now, I know not a lot of you run demon carbs and even less have the older BG-made units...I use a 2007-vintage 850 speed demon/mech secondary carb on my .040-over 440/9.5ish compression/edelbrock rpm heads and intake/comp XE 274 cam (230°@.050)/1-7/8...

I've been helping the neighbor kid get his '71 chevelle going (I know ugh) he had the 350 built for 350-400 hp and is running a 750 demon carb. After going through the steps trying to correct an overly rich idle we took the carb apart and found one of the primary idle air bleed passages did not...