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Sometimes the carb's List number will be stamped on the metering blocks as well. :yes:

4776, 4779, 4780, etc...
 

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Once you change the main body out, it really doesn't matter what model 750 it is anymore since you've changed the main part. If it really was a 750 double-pumper, it most-likely was a 4779 model that originally came with a choke since I can't imagine anyone wanting to change the main body from a HP carb to another chokeless main body if that's what it now has.
 
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