Re: carb size
yes when it comes to carbs "bigger isn't better". keep in mind some big blocks came from the factory with two barrel carbs.
when you say it won't idle, what do you mean? it loads up, or it just dies as soon as it trys to idle?
as far as picking the right carb. you need to know what intake you have, what comp. ratio, what cam, and the specs. on the heads. Like valve sizes, intake runner cc, and combustion chamber cc.
you do want a vac. secondery carb. for the street. more then likely you just need to retune the carb. and my need to change jet sizes
2006 Mustang GT lots of mods ex wife has it
1979 corvette stingray #'s matching 47K org. miles
1970Chevelle SS 454 big block Old School 500hp Sold