I was looking over some Internet info from HOLLEY and I can across this PDF File.
The old Holley Catalogs had basically the same info so I did not pay too much attention to it at the time.
I see tonight that it has some good info that might help PY members:
1) Renew an Trick Kit numbers for specific Carb List Numbers
2) Needle and Seat Part Numbers
3) Pump Shooter Sizes and Vacuum Diaphragm Spring (Color of spring used)
4) Base Plate Part Numbers (if you want to order a 4 corner idle piece , for example
And then it has the info that I have seen for years in the catalog:
Bowl Numbers, Metering Block Numbers, etc.
Here is the link to the PDF File
http://documents.holley.com/techlibr...al_listing.pdf
Lot easier to read if you expand it to about 300%
Tom V.