Re: [Amc-list] Holley 4-bbls for the 258 (was Webers)

[Frank Swygert <farna@xxxxxxx>]

The dual port manifold is much better fro street use than the single 
port racing intake I'm using, that made a big difference!
The Jeepers get by running the bigger carbs because they run higher rpms 
than most street cars and bigger cams. I would never run anything more 
than 500 cfm on a 258 with a stock (or even mild performance) cam.
I looked seriously at the Holley Econo Master carbs. The only reason I 
didn't get one was the choke. They were made for Chevys and use a coil 
spring in the intake, not on the carb. Could have converted to manual 
choke, but wanted an auto.
For a new carb the 465 @ around $300 sounds like the best all-around 
deal. The Holley 390 is around $500-$600 new.
-------------
Date: Wed, 7 May 2008 18:27:01 -0700 (PDT)
From: Greg Taylor <amundaza@xxxxxxxxx>

I ran the Offy Dual-Port 258 intake on my CJ-5, with a 390 Holley.  Was 
great.
   Another option to the Holley 390-cfm is the new Truck Avenger 470-cfm 
4-bbl.  They're a bit pricey, but would fit the bill.  They also sell a 
'low rider' version of it, but I would suspect it's the same carb.  
Quite a few FSJ guys like the 670-cfm Truck Avenger on their offroad Jeeps.
   Just as a side note, I ran a 780 Holley on my full-time 4wd Eagle 
(258-4-speed).  This was on a stock intake with a 4-bbl to 2-bbl adapter 
flipped over.  It ran GREAT, unless I really hammered the throttle down 
... then it would big "a bit", LOL!
   Another option would be to find a Holley Economaster Quadrajet carb.  
It's a Q-jet style carb, with the same diameter primary and secondary 
bores.  They're rated at 450-cfm and designed to replace a Q-jet on 
350-455 CID stock engines.  I picked up a NOS one from Ebay for the 
stroker 304 build.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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