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This is the first carb I ran on my '71 Supreme (the original had a broken air horn). I paid $300 and it ran perfectly. I wish I could still use it but I swapped in a 200-4r trans and this has the wrong linkage. I swapped it to a friend but the choke was stuck so he gave it back (he didn't want to mess with opening a Q-jet). So I went through it; new accelerator pump cup, new float needle, new gasket at fuel inlet fitting, etc. I polished the power piston and bore, adjusted the float level (according to a '71), and adjusted the secondary air doors back to base. It has # 72 jets and 49B main rods with a secondary K hanger. This carb is an exact match to my original '71 Supreme so keep that in mind. New base gasket included and I can include a new fuel filter (for the inlet fitting) if needed (I use an in-line filter). The only problem is that I can't test it. I'd fry my trans if I tried it on my motor. But I have to say, I'm really enjoying rebuilding these Q-jets.
$200 plus the ride. My zip is 61753
(Also posted on the Facebook Olds buy-sell-trade page)