I’m thinking I should have gone with a 650CFM instead of 750 and possibly it’s simply too much carb for a stock rebuild with headers, sensible mufflers and a 90’s era automatic overdrive.
I’ve tried a dozen variations of jets and metering needles included in the 1407 tuning kit, first going lean and then going towards rich and it is still a dog off the line and gets the same 9mpg since we got it in 1981.
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I’m not expecting anyone tune my carburetor by description over the internet but maybe someone has experience with a similar combination and might have some ideas.
I’m ready to order a 650 edelbrock or even rebuild the old Quadrajet but unfortunately dad modified it to idle on the cam he was running before I rebuilt the engine and went back to the stock lift.
Thanks in advance for any helpful comments!
