Dauntless carburetor replacement?

I've searched and searched for the last week, and I can't find the answer anywhere. If someone pops up a link to the info I need, i'm gonna be so embarassed.

I picked up a Dauntless V6 a couple weeks ago, and the carb that was on it was a Rochester 2-jet. Looks like it was a marine carb. Choke mechanisim was half missing among other things. It just isn't going to work for a rebuild, I need a replacement.

The second reason I need to replace it, is the bolt pattern doesn't line up. The PO made two aluminum block adapters to make this carburetor fit. The bolt pattern of the 2-jet that is on it is about a 1/2 bolt hole off all the way around. The carb measures 3 11/16" x 2" bolt pattern.

I'd like to find the right carburetor for the manifold and get rid of the adapters, but I don't know exactly what carburetor to pick up or look for. I'd like to find one with an electric choke if possible, but would run a manual choke if I had to without too much grumpyness.

Does anyone know of a make/model that uses a carb with the same 3 1/4" x 1 7/8" bolt pattern on the stock dauntless manifold? I'd like to find something in the local junkyard if I could, but i'd buy a remanufactured one if I had to if I can find out what make/model to buy it for. Nowhere I look lists a carb avaliable for a 70-71 Jeep w/ v6 that i've found so far.

Or, I am open to buying a carb adapter if someone knows a good carburetor that would work well on the stock manifold?

Any help appreciated.

 

Yea, I would rebuild this one if it were complete. Unfortunatly it is missing all the choke linkage off the side of it. Well, that and the bolt pattern is not the same as the manifold.

So i'm assuming not all Rochester 2-jets are the same bolt pattern, since my manifold and this 2-jet don't bolt together without a couple of aluminum plates that were homemade to adapt it to fit.

 

I just saw a bunch of listings on ebay for the 2GC's with the electric choke on them...looks like they are 290$

http://cgi.ebay.com/ebaymotors/JEEP...ptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

 

Well, I went to a local junkyard that has older stuff laying around it.

Found an old pre-64 Chevy V8 with a Rochester 2-jet. Measured the studs on it, and sure enough, it was the 3 1/4" x 1 7/8" bolt pattern. Fuel inlet was in a different location, no big deal at all though. Still a cable operated choke, but i'm okay with that.

Old rusty, crusty thing. I wasn't happy paying the $45 they wanted for it (just seemed high to me, but I don't buy carbs everyday), but it was complete and throttle shaft wasn't sloppy. Another $14 for a rebuild kit from Napa and I set to work glass beading the carburetor and screws, cleaning it all out, etc, etc.

Got it all back together and she looks pretty good. Figure my time was free for me, so i'm into this carb $60. I can live with that pretty well.

I was lacking the vacuum line for the distributor, so when I took it apart I drilled the steel base for a vacuum port. Wasn't sure if I was going to get it slightly above the throttle plate it should, but figured if I missed, I could just JB weld it up. Luckily I got it right where it needed to go. I went 11/64" for about a 1/2" into it to hold the 3/16" tube (tapped in nice and tight), and 1/16" for the port into the throttle bore. With the throttle plate closed the hole is just touching the top of the throttle plate. I'm quite happy with how that turned out. I've done this mod to Solex's and Webers before, but nothing with a steel body yet.





Pretty stoked. Thanks to everyone for thier help, hope if anyone else needs help in the future and they search this stuff this might help them a bit.

 

hmmm, I thought all the older 2bbl "Rotten-Chester" were the same bolt pattern.
You learn something everyday!
I've learned over the years that ANYTHING Marine, is, 1) weird and 2) twice as expensive!
I got a Holley 2bbl that I'm gonna plop on mine, (you gotta get a E-dapter plate).
But a nice Holley looks so cool on the manifold!
Joe
A jeep is a project that never done! When it is fainnal done, you sell it and start over!

 

Nope, many applications of the 2g with different bolt patterns, CFM ratings, etc. I-6's, V-8's, etc. could be very different. Very good carb. The Dual-jet and Quadra-jet also are great carbs. In my experience problems with most Rochesters were due to problems with the folks who didn't know how to work on them or in the case of Quadra-Jets, folks who overtightened the mounting bolts warping the tops and bodies of the carb. Not very forgiving that way, but a good carb if built properly. One of the best off-road carbs from the factory IMHO. Many magazine editors agree on this who have done extensive testing. Closest thing a carb can come to fuel injection without actually going FI.

 

Yep! They were a darn good carb when carbs ruled the engines!
I guess I just always was lucky enough to be able to pick the same mounting base size, (I was a Chevy junkie back then, so that may explain it).:?
They'd work no matter how much crudwas in the bowl, mixure screws bent.
Someone years ago labeled them "Rotten-Chesters" in a Chrysler shop when I was a "wet behind the ears mechanic" learning my trade, and it stuck.
Joe
Weird how I can remeber that and not the date I got married??

 

Well, this is my first venture into Rochester territory. I'm an aircooled VW guy, but after a vacation to Moab a couple years back I had to find a Jeep to start being part of the scenery rather than up on the overlook staring at it.

I picked up a 62 CJ, and it's been a lot of work. But I like how old and mechanical it all is. It's familiar with the era of the VW's i've always played with. I like how little it is. I have no intentions of lifting it or anything. I am working on swapping this v6 into it and eventually adding an overdrive to it, but that's about it.

VW's, i've got down pat and i'm no stranger to mechanics. But I have to admit that adding some american iron into the garage next to my 63 Bug is quite the learning experience. Some stuff is the same, some stuff is a whole other ball game. It's been a lot of fun.

So do they call it the 2-jet because the only two jets to change out on it are the two in the bottom of the bowl? I'm used to Webers, Dellorto's, and Solex's that have an air, a main, and an idle jet, as well as idle mixture screws for each barrel.

I only came across two jets, and two mixture screws when I pulled it apart. Is that all there is to it? Very simple design. Any tricks to tuning it? Or is it just a simple matter of doing a lean drop on the two mixture screws and calling it good?