Need help troubleshooting my rebuilt engine that won't start

[John *.?-!.* cub owner]

take your head to a engine machine shop, being warped is a common problem. head botls are hardened and specific lengths. if they extend into the open part of the water jacket they will "barancle" and be nearlly impossible to remove in future years. get a set fromyour local dealer rather than reuse old ones or wrong ones. also use copper cote (Kopper Koat? ) on the head gasket when you install it.