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Re: Shaft bushings in Q-jet throttle plate
I know a crazy old hillbilly, that used Brigg&Stratton valve guides, cleaned up with a Khoeler guide reamer, for best fit. Built the carb, & spent the better part of a week tuning. trust me, that Q jet is not for the "faint of heart"! The old bioch ran like stink on a 425 cad in my old longhorn, & it ran like stink on a 325hp 327, in my old flatbed. Biggest mistake I made, I traded that carb , for a new 650 speadbore Holley! That old Q-jet out Holleyed the Holley  Some things can be done for very few dollars, if you understand mikes & reamers & are willing to tune till you "puke"! That old Q jet, is best left to the pros. Not saying that I am the pro, but I built 3 of thos carbs that yr.....2 worked great & the last 1 fell in the trash can. crazyL 
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....
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