<VV> Looking for advice - GB running weirdly.

[Andy Kinzelman]

To All,Regarding the GB I asked about several weeks back; copied below - with follow-up below that.
A local guy has joined the Corvair fraternity - 63 Greenbrier. He was having drivability issues; at tip-in the engine would fall flat on it's face.  He's replaced the carbs, plugs, and wires - all from Clark's.  The van had a Pertronics looking unit; but it does not have full 12 volts (I don't know offhand whether its a I or II).  It started easily and ran smoothly.
Today we replaced the leaking balance tube hoses and the the base of the leaking fuel pump.  Went through the carb initial set-up and balancing.
Timing (steel pulley) was very advanced (guessing 25° BTDC); reset to 13° BTDC. Engine now much harder to start; so reset to about 20°BTDC.
While driving, it still has the same tip-in issue.  I don't think it's the carbs (because it's acting the same way it did with the old carbs).
I'm unsure how to proceed - anybody have any recommendations?Thanks,Andy K.Wisconsin
So, this is what we did:1 - Pulled the #1 plug to see if the timing mark was somehow off (sheared or missing key); as best I could tell it's at least very close to correct.  Still have to run too much advance.2 - Swapped out the Pertronics with a good used points plate, with new points and condenser.3 - Removed and went through both carbs; biggest problem I saw was the floats were set lower than I expected.  Possibly they were dropped during shipping?  Reinstalled carbs and synchronized.  Ran better, but still running very poorly when hot.4 - Although he'd replaced the coil with a new Bosch unit - I still suspected the coil.  Swapped in a good used coil; now it's running pretty nicely.  Even a new coil can be faulty.
So far, so good.  He went for a 25 mile ride the other day, and he's happy with how it's running.  So am I.
Thanks for all of the suggestions,Take care,Andy K.Wisconsin