Mystery Carbs Identified!!

60s Refugee

Well-known member
From the start I wondered about two of my carbs being Holley 1921's like the guy said they were who I bought them from. Turns out they are 1904's. I always thought they looked like 1904's but I was stuck in drive due to what the original guy said they were.

These two carbs have scv diaphrams. The ports are plugged and the choke mechs removed. Cool so far, but they leak. Auto Zone lists a repair kit for these. Looks like there are three major types. Obviously one type is those with no scv. How do I determine the other two?

Wish they had glass float bowls!

Harry
 
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