im getin a carb this weekend and i dont know which to get, should i get a holly quadra jet,or elderbrock quadra jet or a reguler carb, i duno how which 1 to get, i would like a reguler carb but i duno if the vacum lines are all there .

You really need to give more information, such as engine size, modifications performed (cam, heads, exhaust, etc.), and intended use. You also don't say why you want a new carb.

Assuming you're talking about a basically stock 305 that otherwise runs well, you don't need a new carb. It won't be money well-spent if you're looking for performance increase.

As for your list, some clarification is required. Holley doesn't make a quadrajet, although they do rebuild Rochesters and put them in their box. They do make a spreadbore vacuum secondary 650 cfm carb, but they don't call it a q-jet. Edelbrock makes new q-jets, but they are not for computer controlled cars. You'll need a vacuum/mechanical advance distributor, and a straight vacuum (not CC) EGR valve for either of those carbs.

As for "regular carb", I assume you mean a squarebore Holley or Edelbrock. You'll need an adapter to mount it to your stock manifold, which will raise your aircleaner and probably interfer with the hood. I've never had good experience with adapters, although theoretically they should work on an unmodified 305. But, you'll need the above mentioned distributor and EGR valve. Vacuum ports shouldn't be a problem, although you may not be able to hook up the charcoal canister to the float bowl (minor issue).

If you live in an emissions inspection area, give up on the above choices. Your only option is a computer controlled q-jet.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam and intake, World 305 heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" Hedders, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere w/open diff & slipping tranny. Daily driver while Camaro was being put together.

Hmm, and the topic is called Which carb should i buy for my 305?

If everything is relatively stock ( i can only assume it is) A 600 CFM carb should do fine. I personally like Holley carbs, but brand choice is up to you.

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--Steve S--
1984 Trans Am 305 LG4, 5 speed Daily Driver, Flowmaster 80 Series
Holley 600 cfm & vacuum advance Soon: Edlebrock Intake & TES

well i have rite now 8.8 wires, accel super coil,accel distriburator hei i belive it is, 2.5 in exuast, goin into a 80 series flowmaster, im buyin a elderbrock polished rpm performer or a polished rpm performer air gap,im still deciding on them 2 manifolds, as for the car im plannin to make it into performance, in the near future i will be putting on a set of heads,cam,lifters,and headers. sorry if i didnt put al this info in my first post, i didnt realize u guys needed it. i got my new summit catalog and on page 8 theres a holly street avenger carb,570,670, and 750 i belive, it looks just like a q-jet exept it dont have a choke for the 2 barrels for the back,its simaler because of the vacum's,lines,etc etc.

If you are going with the Performer RPM or Air Gap I would be cautios of hood clearnace. I know you can get the RPM to fit w/ a drop base cleaner but I doubt the air gap will fit.
I think the Street Avengers look nice but I don't see how different they are from the regular carbs that Holley offers. I would say go for a regular 4150 or 4160.


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Jay

black 85 Z28, t-tops, 4bbl carb, flowmaster 80 series muffler w/ custom tips (hollowed out cat), edelbrock chrome air cleaner, Infinity 4" 2 way front speakers and Infinity 3 way 6x9s, Alpine CDA-7863 head unit. many more mods planned (holley carb 4160 and edelbrock performer RPM intake coming very soon)
Jay's webpage

i don't have my intake yet, but i do have a Holley 600 4160 that clears my hood. if that helps any.

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1982 Camaro SC-Z hybrid

hey 84transam,where do you live,im in richmond and would like to see your set-up if you have done away with cc carb/dist.I know how to but need it to be easy to put stock carb back on and hook up emission.Or maybe you can tell me who does your inspection aroud here?I have to go threw a killer visual everytime.And about the post If you want to go with a stock c/c carb be careful of where you get it,JET will rebuild your stock one.

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~mike~86 IROC-Z

im not wooriied bout hood clearence, i got a 2 1\2 in daytona iroc hood

If your going to be putting that stuff on soon i would go with a 650 holley

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85 iroc with 305 weind single plane intake 650 double pumper msd crap bad *** cam 350 turbo tranny 2400 stall soon to be 3000 and 125 horse shot of nos and alot of other stuff

Will you clear a stock hood with an Edelbrock Performer Intake, and a Holley 1850 carb?

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---Grady---
1984 Berlinetta.
LG4 305, 150 hp.
Rochester Quadrajet(Comp. Controlled)
TH-700R4.
Flowmaster 80 series/ 3" cat-back pipe.
Accel Superstock Coil.
7.5 10-bolt rear/ 3.08's.
Edelbrock signature series air cleaner -w- K&N Filtercharger.
Pioneer head unit, Pioneer front 4X6's, Cerwin Vega rear 6x9's.
Daily Driver.

Personal Quote: "The Rice-Boys all tremble with fear when the old American V8 draws near."

Hi, sorry it took me so long to respond, since the server's been down. Let's see I'm in the West End, shoot me an email, and we can show off each other's cars perhaps?

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--Steve S--
1984 Trans Am 305 LG4, 5 speed Daily Driver, Flowmaster 80 Series
Holley 600 cfm & vacuum advance Soon: Edlebrock Intake & TES

Yes.