Heres the results:
18x8 Scimitar Prop, #28 Carb-11mm, 40 to 1 Huski oil, Started at 6600 rpm
Cut extra hole in muffler-6720
Gutted the exhaust with two outlets/ bend reed valve stop-6840
Changed to Amsoil 100 to 1 mixed at 80 to 1-6930

Thats going to be it. The bowman ring should help, but without advancing the timing i don't think she will see 7200 to 7500 with that prop.