Sound like classic too much timing... that is one operating limit to initial timing.... advance ignition timing until you get hard start problems like this when hot, and then back it off.
BTW, do you guys over there go to winter-type fuels at the pump? Fuel blend changes in winter can make the fuel more volatile and cause some strange changes in behavior for carbed engines. Pump fuels are being designed exclusively for FI engines now... carbed engines be damned!
Dumb question..... do you have a timing tape on the damper so that you can make these readings of 17 and 32 degrees and so forth? If you don't have a timing tape, how are you reading these advanced numbers?
Another dumb question: If you do have a timing tape on the damper, are the advanced timing marks to the left of the 0 mark on the timing tape when looking at the engine from the front of the car?
And yet another dumb question: By any chance do you have an MSD ignition and are you using a 'dial-back' type of timing light?
