Spread Bore On Offenhauser?

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Anyway RRR, if that's the same base pattern, You're welcome to this half finished cadapter for the postage. I sure ain't gonna use it....
The spread bore adapter? Yeah, I'll take it.
 
That protrusion between 3 & 4 can't be good for airflow........
Being between the primary and secondary barrels, PLUS the fact that the 3&4 runners are independent of each other, makes it a complete non issue.
 
Being between the primary and secondary barrels, PLUS the fact that the 3&4 runners are independent of each other, makes it a complete non issue.

I think it would have an effect on one of the barrels.........

0612hppp_07z-rochester_quadrajet_carburetor-spread_bore_carburetor-jpg.jpg
 
That protrusion between 3 & 4 can't be good for airflow........
Did You read AND comprehend My post? IIRC, the Offy is a square hole w/o that intrusion, & My Cliffy has that plate fabbed for a sq-bore. I overlayed the other adapter to show the base pattern match, & yeah, I'd mod the Cliffy IF I wanted to stick a spreadbore on it. That said, You can't always tell what air's gonna do just lookin' at it. If it doesn't immediately obstruct the throttle blades/discharge, it could shock You & run better than carvin' away at that makin' it "better", wouldn't be the 1st or last time a "WTF?" were induced by such......
 
RRR, if the one your getting doesn't work, let me know what you need I have several square bore to spread bore adapters.
 
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