Would a 4bbl carb be a good upgrade over the stock 2 bbl on a completely stock 400 in a 77 f250?

 

Yeah, but you'd need to be able to let it breathe at the exit. I'd say with a carb, a set of headers would be a good addition. Besides, I think you'd have to get a new intake manifold anyway, like the Edelbrock Performer 400, or I think Weiand and Holley both have offerings in this area as well.

Aaaaaaaaaaaand, if you're going to go that far.........why not just go nuts, and build a 434, with new heads, cam, intake, exhaust, carb, roller conversion, etc, etc, etc............sorry, couldn't help myself.

 

well its costing me my 2bbl. a friend had an eddy 4bbl and he says he wants a 2bbl and will swap even for my stocker.

 

Ebay is a good spot to find the intake for your motor too. I got mine for $70 plus shipping, in great shape.

Also make sure the 4bbl has the trans kickdown if yours is an auto.

 

its a 4 spd so i shouldnt have to worry about the kickdown. im going to get the 2-4bbl adapter for the time being. im low on money. this is just a starting point, plus a great deal. i think im going to build the engine from the top down. its kind of a dumb way to do it but im 20 with no money so im going the best way i can for now.

 

I'm 25 with no money, so I feel ya . No harm in looking around though. The adapters are around $25, and that money can go towards an intake. Although I'm running that adapter upside down on my truck right now. I have the Eddy intake, with a 2bbl Motorcraft on it. The Holley I have just won't work right, even after the rebuild...