4bbl conversion - JeepForum.com
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post #1 of 4 Old 06-17-2004, 11:00 AM Thread Starter
joe johnson
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4bbl conversion

right now i have a holley 390cfm 4 barrel on an offy intake; is there a way to keep the offy intake but put on a two barrel carb?

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post #2 of 4 Old 06-17-2004, 02:06 PM
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Originally Posted by joe johnson
right now i have a holley 390cfm 4 barrel on an offy intake; is there a way to keep the offy intake but put on a two barrel carb?
In the past i too wanted to do the same thing,,keep my intake that the 4bb was mounted on.
I visited my local auto store, and they said there was a plate i could purchase . But that was on a chevy...not a jeep.
One call to a few auto stores or even the jeep dealer parts department will give you that fast correct answer you are looking for.
Good luck.
Keep on Jeep'n
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post #3 of 4 Old 06-17-2004, 05:20 PM
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Aftermarket Holleys all mount the same regardless of what vehicle they are on. The 390 you have would be a Holley square bore. Summit has an adapter plate part# SUM-G1406 for $52.00 and Jegs has a Moroso brand part#710-64966 for $55.99. Keep in mind that these are for adapting the Holley 2 Barrel 2300 series carbs. The stock Motorcraft 2 barrel used on AMC V8's will also fit these adapters.

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post #4 of 4 Old 06-17-2004, 06:37 PM
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I have the offenhouser with the holley 390 as well. But, having nothing but good experiences with this setup, I question your reason for going to the 2bbl setup. Is it fuel econ.? Note: that the holley is very tunable. Changing the charactoristics of the accelorator pump, the main jets, and the nozzels, one can tune the holley to perform well in various situations. I just recently found the right combination for my setup. The results are great. I would need more info before i would agree on the change.
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