Rebuilt '69 350 w/ Edelbrock 750 carb and an in the tuning mode. I did have a cruising part throttle problem but seemed to clear it up by going to a smaller metering rod. I still have an off idle stumble that will stall the engine if I don't punch it. Because I am using the stock intake with a square bore carb I needed an adaptor. What I used was an adaptor from an old Mopar spread bore Thermoquad to Holley single plane intake and just turned it upside down for this application. Could this cause the stumble I am experiencing? I know, I should get a Rochester but they are pricey new! Thanks, Dan
