car still diseling run on prob

Couple of things:

First a standard power valve of 6.5 is too much for 10InHg vacuum. My car
pulls 10-25 and it was too much for mine. Same exact carb you have. I changed
mine to a 5.5 and it made a big difference. Get those secondary plates cracked
open so you can get the transfer slots closed up. Do this before drilling any
plates open. You shouldn't be knocking with your timing limited to 34-35 and
running 93 octane. Are you sure it's ping and not valve train clatter? The
other things to check on timing are when are you at full in for mechanical
on rpm and I can't remember if you are running vac advance or not, but if
you are, check when that comes in and back it off if you can or try running
without it and see if that helps. I have been playing with that carb for a few
weeks now using a wideband af gauge and they run best a little fat period.
A leaner mixture takes long to burn and make power than a fatter mixture, that is why you can have vacuum advance pull your timing to 45+ btdc and
no knock while you are cruising under no load. A richer mixture burns faster so
you need less timing for optimum burn. If it is knock, you might get rid of it
by running a little richer and limit your full in advance to 32-34.

Sorry, might have repeated myself and babbled a bit but I'm at work and
keep getting interrupted...