Carb Question

[project85]

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

[1980c10]

I would think the 600sa would have better throttle response due to the dual feed and it sounds like your fuel line is already set up.

[project85]

also does anyone have a good online source for rebuilding a holley carb?

[werewolfx13]

just pick up a genuine holley rebuild kit for your carb model. A 4150 kit should fit the 4160 too. I used 4150 kits on my 1850 whenever it needed rebuilt, which was on a regular basis on my old gmc. Autozone should have a 4150 kit in stock, if not, o'reilly should.