There are several carburetor kits for the Holley 1920. Please be sure
to match up your carburetor number with the numbers listed with each
Here is where the carburetor number can be found. The complete
carburetor number may not be on the carburetor. Example R-4161A. R
simply means carburetor, 4161 is the list number and for out purposes
is what matter most. A simply means it is an assembly. 1A would mean a
modification was made. In general look for the list number. This will
usually be 4 numbers.
Holley 1920 Identification
The Holley part number is stamped on the fuel bowl. The complete number
like R-3271-A may not actually be on the carburetor. More than likely
you will see something like 3271 A. R indicates it is a carburetor part
and the A indicates a revision. For our pusposes the important number
is the 3271, or the LIST number.
The Holley 1920 carburetor
generally used the Nitrophyl type of float and should be replaced
anytime you do a carburetor rebuild. The Nitrophyly float tends to
absorb fuel over time and can cause the carburetor to flood over.
Unfortunately these floats are no longer being produced, but we were
able to obtain several of these floats.