Holley is to be commened for at least having the balls to make a Ball and Ball Dual bbl. It will sell, and be wonderfull. Period.
In fact, any Throttle Body EFi will work if you can fit it, Holley has indeed made the whole package, which is designed to fix one engineering mess up, the small cap Duraspark, by fitting this Band Aid.
In so doing, it optimized the design for the 258 Jeep (and Mopar 273/318/360) engine bay, and it can never be Emissions endorsed, or totally fix the idle problems.
It has fuel reservoir in the back, and a front sensor which means it'll be a tight fit in anything other than a 258, or 273/318/360
However, Holleys Sniper BBD is a triumph of Engineering over Stupidity.
All the problems with 2-BBL 258 AMC Jeeps not ideling or progressing were due to
1. the stupid small Presolite cap they used on the Ford Duraspark, when Ford had already moved to the large cap Duraspark because of cross fire.
2. The wrong positioning of the carb so both legs of the fuel log get filled. The very issue Jagstang and 63Falcon4drwagon found regards the idle quality of I6 small Fords was figured out by AMC in 1963 with the 195.6 carbs and "intake". Back then, early versions of it and the updated 196 and 232 had a 2bbl WCB Carter intake manifold option
This is the 195.6 in line with the rate roaster plate.
An excellent manifold and carb system.
If you use the Rat Roster Cross Ram Smoky Yunick style plate on a 6 cylinder,
I started in 2011, but got busy earning a living
My background was twin TBi CrossRam and Twin throttle body Crossfire Chevy intake manifolds, so when I found the old AMC/ Nash six cylinder stuff, it was a slam dunk to do it on a Ford log head six.
Based on the Mopar Ramcharger 413 Wedge system, and the later crossram z28 camaro engine
http://image.superchevy.com/f/97506013+ ... engine.jpg
I love Jeep, but I gotta call it as I see it, and IMHO, Jeep made the mistake of trying to use cheeper parts, and avoiding manifold AND LINKAGE changes, as they used the Chrysler Australia Torquefilte or BW 42 kickdown lever and 2-bbl Eamil BBD placement, and so the BBD was placed the wrong way around as a result.
In Fords planned development 1978 era 200 2bbl, it had used the 2150 Motorcraft carb.
So did AMC on other 304 and 345 V8's, but when the 258 came out, the intake was left the Australian Hemi 245/265 2-bbl way, and those cars never idled well either. And Carter supplied the 2BBL BBD, and excellent carb if its placed properly to "two leg" supply the log head.
Meantime, I think anyone getting rid of the Jeep BBD should contact people on this forum, and sell it for 25 dollars.
Then I'd spend a few bucks on a BBD adaptor plate like 63falcon4drwagon, and just run the Carter. Maybee even three.
All the info exists, and no one would be silly enough to run a small cap Duraspark with a carb placed to create an idle backlog which stops both the front three and back three cylinders from having a chance to be well fed.
The Carter will work fine. If you want to feedback it, control the fuel air ratio with the Mixture Control Soleniod, and run three of them.
Help three people take off a emissions legal BBD carb off there Jeep, and use MegaSquirt to do a 100% close loop control of the fuel delivery system like Ford did on the 2.3 liter YFA Carter Ranger pickups and 2.3 Mustangs
This is the carb your looking for.