1995 honda civic dx

.......Recently put a rebuilt head onto my civic at 177k miles , One of the exhaust valves was burnt the rest pretty fryed. Finally got it back together and was driving it today for the first time down to get it inspected . Thing was as gutless as a pinto with 2 cylendars lol........What could be wrong? we might be thinking timing b/c its from colorado and its 7,000 feet above sea level there, or valves need to be re adjusted...........anyone know of some suggestions?

engine # D15b7

HELP PLEASE grandfathers going out of town for 7 days need it fixed before 7th of june so i have somthin to drive