Can any of you suggest a good performance manifold and carb set up for my stock 304? I am sure edelbrock has a performer, but I really dislike their carbs. I am a Holley man. I am thinking a descent combo for this stock motor might be a dual intake manifold and possible 500 something 4 barrel. What do you all think? I don't really want to go crazy and put a cam, lifters and such in this, because if I was going that route I would just put my 540 stroker wedge block and 727 in it. Hmmm maybe down the road..
I just did a edelbrock performer intake with a holley 600. I did go ahead and throw a mild cam in it while I was at it. so far it seems to be working well. had I not bought the carb and intake together second hand I would of went with the holley truck avenger 570.
I am running an Edelbrock 'Performer Manifold' with a Holley Truck Avenger 470 / four barrel on my AMC 304, I can't say enough about the improvements involving off road lean angles. You have to go fuel injected to better this carburetors ability to run off angle. I live out in the woods and can tell you first hand all the street carburetors I have run around the place here in my cj7 have flooded out just backing up or going forward on approach to a steep side hill [every time] just to get out and look the fields over.
They let me down every time I was on a side hill, and I am talking squid turf, nothing changeling at all. Unless you have the time and money to go fully fuel injected there is no better option out there as far as I know. This carb. [ Holley 470 truck avenger] works as well in the woods as it does in the Oregon Sand Dunes. It will do everything you need and then some in that AMC-304
Any dual plane intake, and the Holley Truck 470. Easiest "Plug-n-Play". But I do agree w/Matt that a quadrajet might be a better carb, IF, you want to take the time to dial it in correctly. And have a decent working knowledge of carbs. If you aren't in a hurry, hit the swap meets/Ebay/RacingJunk.com etc....get an old E-Brock SP2P intake and a nice Q-jet. Parts and expertise for the Q-jet are still available if not "readily accessible" at most FLAPS.
I've also learned that sometimes... when people don't agree with you .... its best to hold them down and kidney punch them till they agree with you
The 1 3/32 inch primary version is rated at 750 CFM and the 1 7/32 inch primary one is rated at 800. Like Matt said, though, they have an air dam over the secondaries that keeps them from giving the engine more than it can use. Fantastic carb.
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My First Q-jet was in my 396 SS-RS rag top- 67 Camaro in 1967. It was the cause of more complications then I care to remember. Here was a stock engine producing 375 HP that could not get off the line. I rebuilt the original carb. and played with it all summer then in the fall spent $125.00 on a new Q- jet [lot of money back then] and never got the results I was looking for, until I replaced it with a Holley. With just a few simple adjustments that carburetor preformed almost flawlessly out of the box, I never looked back. As for mileage - My jeep has had three different carburetors installed on the same manifold. They varied from around 700cfm-650cfm-470cfm. My mileage never changed a bit. My time between shifts changed as the flooded engine 'wile running the larger carburetors' required less time to max out the rpm range.
One of the things I like most about the 470 Holley avenger is its simplicity and the improvement in the useable range of power, provided through proper fuel distribution. My cam shaft is what dames my mileage.
Just say en / Red Neck
With a little imagination you could convert the 304 to tbi. There is an adapter for the intake,the rest can come from a doner car or truck. Truck wiring is easiest to work with. Then hills don't matter or cold starts either. Just a thought......
go with the edelbrock, youll never look back. i also like holley but for a trouble free carb that performs good ill stick with edelbrock. every engine ive ever had that sat for a long time, say 6 months or longer, i always had to take out the needle and seats and clean them out or it would flood. i have two engines with 600 edelbrocks and have never, and i mean never, had any problems with them. and they sit without being started for longer than 6 months.