1969 Jeep Dauntless 225 W/holley 350 Carb Stuck In Baja....

Afternoon,

Let me start by saying that I know just enough about engines to get into trouble, but not always out of it... That said, I live in Baja Mexico, and bought a 69 CJ5 with the Dauntless 225 per the cast intake numbers anyway. Not sure about the year of the motor and trying to look on engine stamp to locate. Everything is not really original. Carb crapped out per the mechanic, and so I decided to just replace the Rochester 2G. (so I thought) Got the replacement down to Baja MX, and then see the mechanics building a riser adapter plate to accommodate the different bolt patterns.... WTF They inform me after the new/rebuilt from I5 Auto that the Rochester 2G installation with the riser plate that it's not running well at all. No kidding.... Turns out the original is a Holly 350 R61919 double barrel. Now the adapter/riser makes sense.

So I am wondering what the best solution would be to get the Verde Cabra back to running about town? Rebuild the Holly, get an adapter plate if correct size carb or get another correct carb? I have included photos of the manifold with the part number, the original Holly 350 and the new rebuilt 2G as well as the "custom" riser plate with hand cut gaskets. Any and all advice is greatly appreciated and happy to buy anyone a beer coming thru Baja near Todos Santos. Muchas gracias. (pics too big for file)

 

Pics need resized to 1mb or less

 

We really need to see pictures, but does this still have the original intake manifold? Did the Holley have an adapter plate? Is the 2g you got the correct size?

 

Suggests to me a near-equivalent Holley replacement for the 2G, like an OEM Holley.

However, I get this aftermarket-ish 2V 2300 for a 6R1919 (NOT R61919 as the OP writes)

https://www.carburetion.com/CarbNumber.asp?Number=R7448 (6R1919B)

If this is what the OP has, these are really really easy to rebuild. I suggest he get a kit and clean/rebuild it. "Carb crapped out per the mechanic" per the OP is not at all specific. USUALLY a carburetor needs new soft parts to work again; the hard parts can wear or break but if so, the mechanic should show you exactly what's wrong with this one.

 

He has a thread over on Jeepforum. His picts loaded there.
https://www.jeepforum.com/threads/1...lp-while-stuck-in-baja.4458832/#post-41465892

 

Weird. Looks like it's adapted from the 2G (or similar Rochester 2V) to the 2300, and back to the 2G.

Does the 2G use a plastic insulator from the factory? If so, that may be all he's missing.

Are we sure it's the factory 225 and not a later 231? Block casting might be 1254083, which is an even-fire 231. IIRC the 231 uses a DualJet for some applications, and that may be the wrong pattern for a 2G. More information needed.

 

You need to measure the distance between the carb bolt holes on the manifold. There are two different bolt patterns for 2GC carbs depending on cfm/size and years.
-Donny

 

Looks like a 2G with a small base and an adapter to a manifold requiring a large base. And a spacer. If it were me, I’d remove the spacer and see how that works.

when you say it’s “not running well” what exactly is it doing? The 2G is a very simple carb and should be running well with a few minor tweaks and possibly a jet size change. What size are the current jets?

 

That looks like a 225 manifold because it doesn't have EGR. The Rochester 2G comes in two sizes. The 225 had the smaller one while that later 231s had the larger unit.

Since that's a 225 manifold, I'm guessing you purchased a large bore 2G carburetor. If you found a small bore one, it should bolt right to the manifold.

Small bore 2G:


Large bore 2G:

 

I'm thinking with Fireball that all he needs is a small bore 2gc or.. I don't know if the patterns are shared perhaps a monojet.

 

The larger unit was also common on SBC's throughout the 60's and 70's.

 

Can anyone identify the manifold by the casting number? If I read the block number right, it's an even-fire 231 (it's not super-legible in the OP's pictures). A 231 in Mexico may not have gotten an EGR.

The OP should look more closely at the numbers at the back of the engine and verify that it's a 231 or 225.

 

It's possible it's a non EGR 231 from Mexico I suppose. In that case the OP may have a small bore 2G and needs a big bore. Measuring the carb and manifold patterns are all that really needs to happen though.

 

Here’s a thread from last year with the same intake manifold casting number. Looks like a large base Rochester 2G.

http://www.earlycj5.com/xf_cj5/index.php?threads/148262/