Should I install a Performer Intake and 4 barrel carb on my stock 307?

[splehigh]

Wow! Thanks everyone for the input. I appreciate it.

After you guys mentioned the cam, I remembered that it does have a very mild cam that was installed before I bought the truck. When we rebuilt the motor we put it back in. Not sure what lift or duration it has.

I'm thinking for right now I'm just going to install the intake and maybe try an edelbrock 750 that I have. If thats too big I'll swap the 650 from my 76 4x4 and see how that runs. If neither run right I may have to save up for the right size Holley. I've always heard Holley made better carbs but I got the Edelbrocks for cheap so I might as well use them.

I may get headers eventually but for now I'll keep running the ram horns.

Thanks again everyone!

[68lwb292]

To me Edelbrocks seem to be more streetable and less fussy than a Holley but for the track I wouldn't have anything but a Holley. But that's just my opinion and if you ask my wife my opinion doesn't matter much LOL.

[prostreetC-10]

If it's a 1407 or a 1411 750 Ed it will be too big. It's one of those things where it WILL work but it's not the right carb. Gas mileage will take a hit and you are defeating the purpose of trying to improve your performance. It's one of the hardest thing to get hotrodders to accept: If you can't have the perfect carb and you are forced to go a little bigger or a little smaller....smaller will always be the better way to go. A 750 is just too big.

[splehigh]

Thanks for the Carb Lessons ProStreet!

Would I be able to put smaller jets in my 750 or do I just need to find an 1850? I'm not sure what model 750 it is. I'll have to check when I get home.

[prostreetC-10]

I love when I see someone listing a carb that has been jetting from a 750 to an 850 or vise versa. Jets only control air/fuel ratios....not cfm. Course, if you want to get techincal, I guess you could have something jetted so fat that it would slow the cfm but lets keep this simple.

Jetting will do nothing and with Ed's in involves jets and metering rods. I don't know about where you are but 1850's pop up on craigslist all the time for $25. You just have to make sure you get one that is worthy of being kitted. If it's too far gone, it will require additional rebuilding that you will not be able to do.

[68Stepbed]

My suggestion would be any of the following:

A) 500 cfm 2 barrel Holley. I know this seems strange as you're wanting to change FROM a 2 bbl, but a Holley 2bbl is performance oriented, yet very streetable.

B) 500 Edelbrock. The only good Edelbrock carb I EVER had was a 500 cfm with manual choke on a stock 350. The throttle response and fuel mileage was almost like having fuel injection. It was perfect.

C) 570 cfm Holley Street Avenger. These carbs are GREAT!! I have one on my mild cammed 350. It's a great carb. I set a tune on it 3 yrs ago and haven't had to fool with it since. It also worked great the three years prior to the resto with the stock engine. These are well built carbs designed to run on the street.

I do not recommend going bigger than the 570 cfm rating. your streetability, gas mileage and throttle response will suffer.