You might try to find a 1.33 Autolite....

......they are out there.
Or milling off the air horn. possibly just taking the choke plate out.

Spacers typicly only increase low end with the double hole helping this more.
The single hole might help more with the high end power.

Ed Jenkins

Ford Galaxie Club of America member #3350
1966 Galaxie 500 Convertible built in Chicago Illinois, will have a stroker 390( 429 cid?). 780 Holley?, built C6, Crites Aluminum radiator, and a rust free frame from the south. Work continues.

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