Technical Rochester 2 Jet identification help

I picked up this crate full of 2 jets and parts for $20 last night. I'm not really familiar with these carbs, but I figured if I ever used just one of the three that are in it I'd have made good use of my money. None of them have any markings on the body except for 2-jet and a stylized RP logo. I was really kind of hoping I'd be able to use them on a three deuce setup at some point, would it be possible with these three? I know Pontiac used Rochester two barrels on their tri carb intakes, but don't know if there was anything special about them.

Thanks,
HB.

 

Side inlet carbs are preferred for tri-power setups as it is easier to plumb. Pontiac used large bore RP end carbs and all large carbs after 63(?) Typical Hot. Rod TP setups use small bore carbs. Without the original ID tags it is impossible to determine what they were originally from. They look like complete rebuilds are needed anyway. Including jetting changes. Good luck.

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@BOSTONCAMARO and I were just going through some parts I got over the weekend and I came up with three of these. He rebuilds and sells a lot of carbs on the side and his research came up with a little info. It indicated that, at least, the ones I have were used as the center carb, with a smaller variant on either side, most commonly.

He also told me, essentially (not his exact words), that anything that is involved in a triple carb setup is more valuable than things that are not, by default, even as cores.

So, I'd tend to say you scored there and definitely have more than $20 worth.

 

I was in the same boat. I got all excited when I found a number cast into the carb body that looked a lot like a model number (704nnnn), but I couldn't find that specific number. After a lot of looking, I discovered that that is the part number for the body casting on many, many models. So "trebil" is right on everything he says. I ended up just picking the carb that best fit my application, and went ahead and rebuilt it The kits are pretty universal, so if you get one for the same era carb, you should be alright. (e.g., the kit I used on the last one I did had FIVE versions of the top to body gasket included!).

 

General Motors used both types of inlets on factory tri-powers.

58 chevy 348 was front inlet, and 59-up 348 was side inlet with inner filter element. Olds 57/58 371 was front inlet, but I'm not sure on 1950's Pontiac and Cad 3x2 inlets.

 

yeah i think many variations based on same bodies, some worth more than others....

 

I say you did ok, the side feeds are used to make a tri power set-up (need to modify 2 outside base plates). The small threaded front feed could also be used for a tri carb set-up. The main difference in value is the small base VS large base, large base being the large front feed fuel inlet fitting are worth less money and used on larger displacement motors (350 and up).

I used to get them at the swapmeets for $5 each but now your lucky to find one for $15. Some have heat chokes, some have manual, different arms for linkage......but interchangeable. I would get another side feed and sell the front feed, you need to eliminate the idle circuit and seal the ****erflies on the 2 outer carbs to make a tri power.