Most guys dont see the point of slapping a 2bbl carb on a factory stock intake manifold. As for me, it seems to be the ticket atleast for now. Being a new dad, I am broke and jonesing for a new project. I am also very displeased with the Carter 1bbl. Doesnt give me much on the highway at all. So, Ive got this Holley 2bbl from a mid 70's LTD that I am going to rebuild. I found a 2-1bbl adaptor that will work perfect to the tune of $12. My plan is to bore the 1bbl hole as large as possible and match the spacer to the same diameter. I will also slap on some EFI headers if I can figure out how I will do the exhaust on the cheap. I dont want to port the heads for fear of voiding my 100,000 mile warranty on the long block. BUT, I will be adding chevy 250 rockers.

The one thing I am wondering is for someone who has installed this carb on their 300. I am thinking I will have to rejet the carb but I dont know where to start. Any suggestions?

 

Get installed and running and then see if the jets need changed one way or the other.

 

Okay, I did some learning and found out that the carb I have has 1.08 venturi's. I was wondering what venturi size works best with the 300?

 

1.08's are highly desirable and should work well.

 

The 2bbl adapters do make a difference, I had one on my 84 F150 for a short while until I had the loot to get the Offy DP. You will be surprised how much it wakes these motors up, the EFI manifolds are a great I idea too.

 

MotherTruckinMarine,

Go to Fordsix.com and push the tab for Technical Section. There are two excellent articles which will be of interest to you: (1.) Upgrading to a 2V carb (2.) 2V dyno comparison.

 

Thanks guys! It's good to know that a 2v on stock manifold works well.

Jas anyone done that H.E.I./Duraspark conversion on their six?

 

Classic Inlines Performance Parts - Ford Six Tech Articles

Look through the Tech section. Most of these articles are for the SB6 but the principles are applicable to the BB6 too.

Also, the poster on the FSP Forum who goes by "mutt" is the resident 2v guru at that site.