Quote:
Originally Posted by 46yblock
The small carb sounds like one for a 144/170 I-6. The larger with glass bowl fits the description of a Model 1904 for 215/223. It would be a List 1415-A, which should be on the carb. Ford number is EBP9510. Check the center to center dimension of the base holes for match to intake. Also look for throttle linkage compatibility. But the 1904 is the model you want. As for jet size, dont know. 66 seems too big. Try 58, if too rich then 53, and step down until plugs look good.
If you wait a couple days, I have a 1904 in the shop I've been meaning to get to, and can see what it has for a jet.
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I agree that the glass bowl carb is the one to use. I have an old Holley manual and specs book. It lists the 1952 thru 1956 215 and 223 6 cyl.glass bowl holley's as having a #66 main jet. It lists two different glass bowl carbs for the 1957 223. One is #68 and one is #69 main jet. It sounds like you may have a carb earlier than 1957, which is good too. Just stick with the main jet that is in it now, and check the plugs and performance.
You may be able to see the part number of you're carb stamped on a small flat surface next to the fuel inlet fitting.
Sal