holley metering block ?s

I have an older Holley 750HP and it doesn't have that many emulsion bleeds and they are just drilled, not inserts. Just noticed the PVCR holes/inserts are lower in the PV channel like aftermarket blocks also. My HP has drilled holes in the center like std Holley's. I haven't have a Ultra HP apart so I don't know what they have but it'd surprise me if they had 6 emulsion bleeds from the factory. Just a guess but I'd say their either aftermarket or modified. I'll dig through my book and see if I can come up with those #'s. It's a big book so it may take me a while. Will get back to you tomorrow and let you know if I find them

Do you have a small set of numbered drill bits? If so you can use them to measure the size of the idle restriction holes, the power valve channel restrictions, and the emulsion holes and that'd give you an idea if their for a gas or E-85/alky carb