I think I would rather not know...

"The Master Cylinder"

Enjoying life at the beach in SOCAL

Factory outer carbs had cast iron bases and no idle mixure screws and are somewhat hard to find. Aftermarket replacemants are aluminum and painted black look the same. Summit, Jegs, Speedway all sell them along with progressive linkage . Rochester 2GC were made from 1955 to the mid 80's and some later on Jeeps and Mercury Marine so there are millions of them. Hope to have mine constructed soon.

After I put on the manifold I may use blanks to cover the outer carb flanges to get the center carb tuned right along with the electric choke. At 69 years old I seem to take my time on things now....To bad I don't know how much of it I have left.....JD

56 Vic, B'Ville 200 MPH Club Member, So Cal.

The end, or outer, carbs had no idle circuits, only mains and accelerator pumps. The factory (mechanical) linkage on the later versions was non-adjustable. There were a lot of aftermarket linkage setups that were adjustable. The early linkage setups were known for sticking wide open. Could be a problem in traffic! Pontiacs were the worst although the J2 Oldsmobiles used the same basic architecture.

Frank/Rebop

Bristol, In ( by Elkhart) 

I had a fair amount of experience w/the Pontiac set-up w/2GCs'. They switched to mechanical linkage in the early to mid-60's. The end carbs would kick in at 1/2 throttle. They would kick in progressively due to the design of the linkage. It worked quite well and was easy to set up. IMHO!

My recollection of the GM tripower setups was that the end carbs only have power circuits, and operated in an "all or nothing" mode. They were opened by a vacuum diaphragm actuated by a switch on the throttle. They opened all the way when you stomped the pedal. No mid throttle operation. Somebody correct me if I'm wrong.

John - "The Hoosier Hurricane"

Thanx for the replys. The manifold has 4-3/4 center to center and will definately be tight. The carb tops have the side fuel entry and Charlie Price from Vintage Systems says he makes the fuel lines and fittings to fit that number. I'm working on an electric choke for the center as I wait for the manifold from the powder coat.

I like wierd stock looking things so I might be able to fit the a stock appearing 4-barrel air cleaner over the whole thing covering a lot of the "stuff", but thats going to be real close. A 57-59 can cover it with the bottom cut out. I also have the ability to make a fiberglass cover using an old moon disc for the top and rolled steel side for the pattern. Would look good painted argent with a Ford service decal on the side.

I know the look of Strombergs and the 3 bolt Holleys are more traditional but I just do things I guess to be different and I really want to cover them up. Probably should paint it Ford red and grind off raised parts..............Thanks

56 Vic, B'Ville 200 MPH Club Member, So Cal.

In the Classic Trucks Y-Blk series, Doc Fromader mentions using Rochester 2Gs for a Tri Power setup. He suggested they were a little later type carb & quite reliable. Not much detail given, but I think his supplier at the time (2001-2) was Bob Kunz Automotive in St. Louis MO 63123. (314) 845-63123. Still in business..??

Paul

There was a thread about Rochester 2GC's on a 312 on the H.A.M.B. recently you may want to check out. Apparently they will fit as there is a picture of the setup. Don't remember if they mentioned what manifold they used tho. Good luck getting to the idle mixture on the center carb tho.

Just my 1¢ worth here but I just don't like the LOOKS of the 2GC's, compared to Strombergs (or Ford/Holleys).

"The Master Cylinder"

Enjoying life at the beach in SOCAL

DryLakesRacer, wish I could help you. I had an eldebrock 3-2 manifold with machined aluminum adapters for a matched set of Rochesters for a 348, just like what you speak of. It sat around about 15 years. It had no linkage setup for it and I never did get around to setting it up for my bird. I happened to mention it to a old scrub lover one day who had a 409 he was building and he became the new owner.

       A  L  A  N   F  R  A  K  E  S   ~  Tulsa, OK    

Wan't there a post a while back of the bigger carbs being use with some modification? CRS! Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire