I would set all in timing to 36 degrees as a moderate setting. Choose a shift point (didn't give cam info to determine valve float point), and from that point keep these two variables constant as I jet the carb for best mph.
After carb sweet spot is pin-pointed, I'd see if I could make anymore power by increasing the timing 2 degrees at a time, but better to be safe in this area. Back it off if you start to lose mph, see flecks on the plugs, or hear any detonation.
I personally have always kept my shiftpoints low, say around 6,500 or so. I don't feel I'm losing more than a hundreth in ET, but hopefully helping my motor's longevity in keeping the rpm's down.
Good luck, and have fun!
-Tanner