Offenhauser intake

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Oct 12, 2003
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I bought an Offy and a 600/650 Holley on e-bay. The manifold fits fine, but the carb hits the brake booster. Would a 390 cfm fit any better or is this manifold for a pre disc brake fj40. help!!
 
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Sep 28, 2003
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I haven't gotten mine installed yet (lack of carb), but that carb sounds WAY too big for a 2F. From what I've heard, the best thing to put on there is an Edelbrock 500CFM, either a 1404 or a 1403.

Also, is your intake a dual port or C series? If C, I've heard you have to install the carb sideways. Not sure on that, though.

Oh, and I actually have 2 offy's...One for an F, one for a 2F (got the F by accident). Then ONLY difference between the two is the heat riser bolt pattern. Would still work fine on a 2F, if you either don't use the heat riser or used a header. But it wouldn't have any effect on the carb hitting the booster.
 
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Yea, I kind of figured that carb was to much. My offy is a dual port and the carb does fit sideways. But before I drop green on another carb I want to make sure it will clear the booster.
 
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I've never measured the carb bodies to find out but I'm pretty sure you're going to find the 600 and 390 are the same physical size or mighty close.
 

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