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Old 08-15-2004, 08:12 PM
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Ford Spread Bore

are there any new carbs with a spread bore that will bolt onto a OE ford FE intake manifold? or any adapters that will allow one? I dont need the ford kickdown(my linkage has it not my carb as in latter models) but i dunno if quadra jet carbs like this one: http://store.summitracing.com/partde...7D#largerimage

will fit on my oe 4 bl intake mainfold from a 68 merc

and if not do spread bores improve gas mileage all that much? compared to a sqaure bore that is

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Old 08-15-2004, 09:12 PM
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Ford factory intakes require square bore carbs so if you want a spreadbore carb on there then you will need to buy an adaptor and they are found at most automotive parts stores. As far as will it improve gas milage...well that depends on how heavy your foot is. By the way, that Quadrajet carb that you refrenced to is a Holley and a really good one at that. I think that it will work fine for a dailey driver.
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Old 08-15-2004, 09:19 PM
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yeah i thought id need an adapter, what all would i need to have to get it to fit? and i live in a pretty small community(3000 people or less) and would like to get the car running ASAP so i can take it to the state fair when i go, would jegs or any place like that have it so i could order it like that and get it faster than waiting for NAPA or Mr. Automotive to order it get it, hope it works etc

well better gas mileage as far as the primaries only compared to a square bore
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Old 08-15-2004, 11:06 PM
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http://www.jegs.com/cgi-bin/ncommerc...00&prmenbr=361

would the first product on this page do the trick? it says its for carter quadrajets but since the carb i have picked out is based on the quadrajjet as well...?
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Old 08-15-2004, 11:49 PM
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jegs has a 5/8's thick phenolic (plastic) spacer/adapter for what you need for 29.99 and moroso has a 2" spacer/adapter for 53.99 and last and least they have the mr. gasket adapter but i do not recommend that one for16.99.the moroso and mr.gasket are both open and the phenolic has 4 holes which probaly what you want.
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Old 08-16-2004, 08:55 AM
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ok, so im guessing that the outside 4 bolt pattern isnt what i need the adapter for, so what what needs adapting?(just out of curiosity)
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Old 08-16-2004, 09:42 AM
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Squarebore carbs use the outside holes and spreadbore carbs use the inside holes. Once you get the adaptor it will be self explanitory. It goes on pretty easy.
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