94 Tercel ticking noise

Bought a 94 Toyota Tercel with 122K. The owner said that it needed a head gasket. So I pulled the head off. I inspected and cleaned the head and noticed some of the valves had a large amount of carbon build up. I cleaned them up. Replaced oil seals, head gasket, exhaust and intake manifold gaskets and valve cover gasket. The car started up right away but aloud ticking noise. Cannot pinpoint area. What might be the problem. Also the diagnostic port is quite different from my scan tool. Is there an adapter? Thanks, Tim