Help

06 ltr 450,Just did a 500 Athena kit with cp piston,complete kibble white cylinder head,hot cams stage 1,hot cams heavy duty timing chain,so it started but it starts hard but runs fine when I get started and takes fuel when hitting throttle but now I cannot get it started no power to starter, when I check power at ignition button it reads 11.7 then I hit button and reading goes blank,checked solenoid and there is power there,checked plug that goes to starter and no power?