I would think your initial timing should be @ about 10 Degrees, but double-check that with someone
You may benefit from a little higher initial timing ( mine's @ 11 but I could get 12 maybe after I fatten up my primary circuit in my carb ), but you'll need to listen for knock under mild load, like uphill, so you don't get detonation
I can't push my timing up too much because of my Compression.....you may be able to go higher with your setup. Just don't let it Ping
Total timing may be OK up to 36 Degrees, depending on your parts and the Octane
Mine is OK @ 36 due to my Octane....no knocks/pings
Most pump fuel racers don't go above 36