tram602

I have the stock carburetor on my 1984 Pontiac Trans Am 305 (not H/O). My father and I are not experts, but we rebuilt it twice. It still seems to hold back, doesn't choke, idle ranges from 500 to 900 on a normal basis - car has no cat in the exhaust.

We picked up a Holley 4360 at a local swap that was brand new (old stock) in the box from 1977 I believe. It was a close fit - but everything bolts up so far, with the exception of the choke hook-up being almost up against the EGR. Also need an extension for the overdrive tranny kickdown cable for the linkage.

I'm sure there's guys on here that know way more than I do about this. Will this carburetor give my car any trouble? Is it an ok exchange?

I originally came on here to look for the vacuum diagrams, but I thought i'd ask this.

Thank you.

five7kid

iTrader: (14)

I'm not familiar with a 4360 model. Do you have the List #, or pictures?

tram602

Where do I find the list number? I will take pictures here in a little bit

five7kid

iTrader: (14)

The List # is stamped on the front of the choke tower/air horn, typically.

Apeiron

five7kid

iTrader: (14)

Oh, yeah, that carb. I'd forgotten it was called a 4360. Actually had one on the 396 when I got it from the in-laws.

A 450 CFM econo-wonder. I put it on a GMC truck before I sold the truck. Not that it ran bad, and it was probably fine for the truck, but it certainly isn't a performance wonder.

ZROLimitRacing

it all depends what your looking for, that carb you have will work. that carb will be good for fuel econemy and reliability but deff. not performance. a 650 CFM Double Pumper would be good for your car if you are looking more towards performance and dont mind a little less in your wallet after leaving the gas station. it all depends on where you are going with the car man.

Angelis83LT

Another thing is with the holley since your car was originally Computer controlled you will need a new disty too. if you didn't get one. you need a non-computer controlled one. it all works together the carb and disty. also you will probably need the 20-121 part for the TV-cable and the right tv/throttle bracket to hold the cables. pretty standard for a holley in a thirdgen.

tram602

Thank you for all of your help guys.

I just ordered the 20-121 part last week and it came yesterday. I need a new throttle bracket too? You said a new disty - I'm a NOOB to this board and not really sure what you mean.

I got new vacuum lines off of an 83 out at the junk yard today. I'm gonna put them on. Yeah the other carb was computer controlled.

My car is completely stock with no mods on it. The only big thing I really changed is upgraded from the "Bowling ball - Knight Rider" hubcapped 14 inch wheels to gold painted 15" aluminum rims. Still kept the original rims though.

Any other tips and suggestions - please post. Thank you.

five7kid

iTrader: (14)

"Distributor".

Angelis83LT

yes. on the computer controlled cars when you remove the computer controlled carb, your have to replace the computer controlled Distributor. the advance is set electronically on your car. it can't be if you go to a non-computer controlled carb since it will not have a bit of data going to the computer to help determine where it should be. The car will run, but your fuel economy will go out the window.. it would be like taking a non computer controlled distributor and unhooking the vacuum advance canister...

Vader

And you might want to read this - From a self-described HOLLEY guy at www.bob2000.com:

Common Questions and Answers:

Question: Is the Holley spreadbore better than my Rochester Quadrajet?

Answer: Not at all. The Holley spreadbore carb is a poor imitation of the Rochester Quadrajet. Here's why.

The Rochester Quadrajet is a modern design, and uses some very forward-thinking features such as a central float bowl with one float, vacuum-operated metering rods for power enrichment, an air-door controlled secondary, and no gaskets below fuel level. A couple of disadvantages are its sliding cup accelerator pump, and hard-to-find parts.

So, how does this relate to Holleys, since this is a Holley page? The design of the Holley spreadbore replacement leaves out many of the good features Holleys are famous for, and leaves off most of the good features of Rochester Quadrajets.

The Holley spreadbore lacks these features, which are standard on its squarebores: Externally adjustable floats, standard accelerator pump nozzles, standard gaskets.

The Holley lacks these features, standard on a Rochester Quadrajet: Metering rods for power enrichment, air-door controlled secondary.

Since the Holley is lacking in so many things that the Quadrajet excels at, I recommend to anyone who is thinking of putting a Holley spreadbore on any engine: Don't! If you have a spreadbore intake, use a Rochester Quadrajet. If you really want a Holley, change the intake manifold to use a squarebore Holley. Don't use adapters, either! They are proven power robbers.