5.0l 2bbl to 4bbl swap

[JFoshee]

I searched for this in the forum, but there are so many I couldn't narrrow it down. I want to swap the 2 bbl carb to a 4 bbl carb on my 305 once it's rebuilt. I have an aluminum intake and an Edelbrock carb. I know the bracket for the throttle is different, but what else will be different? My carb dosen't have a choke actuator. Is there an aftermarket that mounts to the Edelbrock?Should there be any issues with swapping the carbs? Also the cast intake that came off has a tube that hangs down on the right side( looking from the back), it bolts on the top side of the intake. The 4bbl intake dosen't have a place for this. What is it and is it necessary? Thanks for any help.

 

[jtybt]

Re: 5.0l 2bbl to 4bbl swap

The edelbrock should have an electric choke. That's what that tube is for so you don't need it.

 

[John_S]

Re: 5.0l 2bbl to 4bbl swap

We need to know year and model of your engine. Pictures will help as well. A "tube" could be the fuel pump rupture discharge hose on pre-'98 or on '98 vortec, a heat transfer tube to warm the intake since it doesn't have exhaust cross-over ports.

Fuel line and flame arrester will have to be changed.