Stephen Daugherty

I'm joining to get help and opinions on my z... I just had the entire bottom end and carb rebuilt new rings and plug rose it maybe 4 hours and on the way home it backfired and blew the carb boot from the head and now it won't start? Getting fuel and fire but when I check the plug its covered in fuel? I've checked time and clearance everything seems to be fine? Just cant figure it out?