What bolt pattern?
Thread Starter
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Cargo Master
Joined: Sep 2007
Posts: 2,095
Likes: 2
From: Wahpeton ND
What bolt pattern?
I have a holley 390 CFM carb with a pattern that is 5 5/8 by 5 1/8 and an intake with a 3 7/8 spacing.
Seems to me Ive got a Holley teapot intake and a spread bore carb! anyone know the spacing or if there is a adaptor available?
Seems to me Ive got a Holley teapot intake and a spread bore carb! anyone know the spacing or if there is a adaptor available?
i ain't rite
Joined: Mar 2005
Posts: 65,445
Likes: 5,517
From: Marlboro Mental Hospital.
yes they make adapter plates. any good speed/hotrod shop should have one on the wall.
here are a few from ebay.
eBay Motors: Holley to AFB 4 barrel Carburetor adapter plate (item 380077123368 end time Dec-28-08 13:08:56 PST)
eBay Motors: NEW! Holley to Quadra Jet carburetor adapter plate kit (item 270279261908 end time Dec-22-08 15:29:13 PST)
eBay Motors: ALUMINUM 4 BBL ADAPTERS CARB ADAPTER HOLLEY EDELBROCK A (item 330295731696 end time Dec-26-08 19:10:53 PST)
eBay Motors: ALUMINUM 4BBL CARB CARBURETOR ADAPTOR HOLLEY AFB (item 310092165017 end time Jan-12-09 16:49:04 PST)
here are a few from ebay.
eBay Motors: Holley to AFB 4 barrel Carburetor adapter plate (item 380077123368 end time Dec-28-08 13:08:56 PST)
eBay Motors: NEW! Holley to Quadra Jet carburetor adapter plate kit (item 270279261908 end time Dec-22-08 15:29:13 PST)
eBay Motors: ALUMINUM 4 BBL ADAPTERS CARB ADAPTER HOLLEY EDELBROCK A (item 330295731696 end time Dec-26-08 19:10:53 PST)
eBay Motors: ALUMINUM 4BBL CARB CARBURETOR ADAPTOR HOLLEY AFB (item 310092165017 end time Jan-12-09 16:49:04 PST)
Thread Starter
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Cargo Master
Joined: Sep 2007
Posts: 2,095
Likes: 2
From: Wahpeton ND
So, I have a spreadbore carb and an AFB intake?
3 7/8 spacing is square bore?
currious as to what spacing I have as Id like to get an adapter that maintains my "dual plane" intake.
3 7/8 spacing is square bore?
currious as to what spacing I have as Id like to get an adapter that maintains my "dual plane" intake.
i ain't rite
Joined: Mar 2005
Posts: 65,445
Likes: 5,517
From: Marlboro Mental Hospital.
a spread-bore carb will have 2 large butterfly plates, and 2 small ones.
a square-bore will have 4 equal size butterfly plates.
most aftermarket intakes will automatically have both large and small carb bolt patterns on them.
you are using a stock 4 barrel intake??
if so, an adapter plate will fix you up.
i would go to a speed shop though to make sure you get the rite one instead of buying off of ebay.
it has been quite a few years since i did the adapter plate thing, and don't remember the proper bolt pattern sizes
a square-bore will have 4 equal size butterfly plates.
most aftermarket intakes will automatically have both large and small carb bolt patterns on them.
you are using a stock 4 barrel intake??
if so, an adapter plate will fix you up.
i would go to a speed shop though to make sure you get the rite one instead of buying off of ebay.
it has been quite a few years since i did the adapter plate thing, and don't remember the proper bolt pattern sizes
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