i have two holley carbs. i have a dual feed 4150, which is a 600cfm street avenger, on my 350 engine now. it doesn't run right and hesitates and actually has started not wanting to idle. the other carb is a single feed 4160, also a 600cfm on another motor that has been sitting for awhile. i am curious if there is any difference functionally between the two? i don't know if one has an advantage over the other. i want to rebuild one of them so i want to make sure i put the work into the right one.
thanks