Carb Replacement on 327

[Ben5959]

Since mine is a Daily driver, I'm thinking about taking off the stock 4 barrel carb on my 327 and putting on something new and more reliable.

Ill rebuild the stock carb in time, (already bought a kit) and put it on the shelf in case i ever sell the ol girl.

Never done this before so Id love suggestions on a new carb to go back with. 600-800 CFM? don't want to overdue it and guzzle gas unnecessarily, but i do want performance and power. Edelbrock, Holley, Rochester?

love some advice from the experts. thanks fellas

[TJ's Chevy]

600 cfm edelbrock 4 barrel would be a great choice. Might need an adpater. Not a v8 smarty so I'm not sure. lol But I know that that is plenty of carb for a 327.

[morethanstock66]

x2 on TJ's recommendation. For a good DD carb, you can't go wrong with a Edelbrock 600cfm for a sbc. Plus, Edelbrock is a very easy tune right out of the box.

[VonDog]

I'll throw in my 2 cents, probably a spread bore with a quadrajet is what you have. I'd stay with the quadrajet as the primaries are smaller then the Holly or the Edelbrock and you'll get better fuel economy if you can keep your foot off the floor.

[Ben5959]

Will going back with higher cfm help performance or will it be a waste? as I understand it, the higher cfm, the more air comes through the carb?

[Wrenchbender Ret]

You didn't specify what year truck or what model carb it has now. Some of the early models had heat passages under the carb & don't match up to well with the newer carbs. I would go ahead & get an Edelbrock performer manifold & a Q-jet from the late 70s to early 80s. Or an Edelbrock carb in the 600 CFM.

[Ben5959]

Sorry. This is on my 1966 c10.

[Eddie H.]

I put a new 600 cfm 1406 Edlebrock performer carb on my SB 400 20 years ago and haven't touched it since. It ran perfect straight out of the box, and still does.

[MikeB]

Originally Posted by Ben5959

Will going back with higher cfm help performance or will it be a waste? as I understand it, the higher cfm, the more air comes through the carb?

Not too high. 500-600 cfm is more than enough for a 327 unless you're spinning the engine at more than 6000 rpm. Anything bigger will actually hurt performance. High performance, solid lifter 327s never had anything bigger than a 585 cfm Holley.

If the aftermarket made a 450 cfm carb, that would be even better. A 390 cfm Holley (#0-8007) would work great in a stock 250-300 HP 327, but it's way expensive

What type of carb do you have now?

[TJ's Chevy]

Originally Posted by MikeB

Not too high. 500-600 cfm is more than enough for a 327 unless you're spinning the engine at more than 6000 rpm. Anything bigger will actually hurt performance. High performance, solid lifter 327s never had anything bigger than a 585 cfm Holley.

If the aftermarket made a 450 cfm carb, that would be even better. A 390 cfm Holley (#0-8007) would work great in a stock 250-300 HP 327, but it's way expensive

What type of carb do you have now?

Holley has a 450 cfm that I believe is cheaper then the 390...what ever happened to the 390 being the 300 dollor carb...now suddenly its almost 500 and electric choke is the only option.

[Captainfab]

The Holley 450 cfm carb is intended to be used in dual carb applications and does not have provisions for a choke. I would go with either a Holley Street Avenger 570 or a Edelbrock 500 cfm carb. Keep in mind that the Edelbrock carbs are very sensitive to fuel pressure. A Holley 600 cfm carb will work but you may have to jet it down a little.

[AcampoDave]

I run a 500 Edelbrock on my 283. Its good but they are jetted for performance/dual quad applications, so I had to lean it out.

[SierraMtns]

I am running a Holley Street Avenger 570 on my 283 that was on there from the PO. For these style carbs I prefer the Edelbrock 500 over the Street Avenger.

[crazy longhorn]

I run a 1406 on my "327"...little bro ran it on a 305, no issues? I swapped the step up springs, to make her play nice with the LS 5.3, but other than that, no changes You could go 500 cfm, as Captn suggested & may get better part throttle response (spunky ride on the street)? Edelbrock, is a "set it & forget it " carb....nice street player. Just watch the fuel pressure (5-5.5 psi). If you want to race the truck, Holley is my favorite to tune on Longhorn

[TJ's Chevy]

And if all else fails...throw a demond on there.

[61K10]

I put one of these on my cheap 350 crate eng. Quick Fuel 600cfm and tunable. adj vacuum sec. with a screw driver only. when i bought mine it was cheaper than a holley or Ed by few bucks.

[Ben5959]

thanks guys, looks like i am going with the 1406 edelbrock since it seems like the easiest install and tune. Also good price. ill keep yall posted

[TJ's Chevy]

The edelbrock 1405 is the same cfm with just a manual choke. I am currently running it on one of my 292 inlines with no issues. $295 at summit no shipping charge.

[MySons68C20]

I love manual chokes!