Sorry Kero,.. I think Ratz might be right,.. but, I don't know how well it run without one...
Anyway,.. now that you have one... in Chicago,(near sea level?), and with a K/N filter,...(I assume you either have or will get a non-stock muffler of some kind)... I would start with a 152.5 main jet and a 50 or 52.5 pilot... 2/3 thickness spacer on the needle jet... should put you in the ballpark...
Replace the four top and bottom screws with allen heads for easy service in the future...
Best of luck,... and hope you get to join in the Scavenger hunt soon...