<VV> Looking for advice - GB running weirdly.

[Andy Kinzelman]

To all,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

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