civicracer1993

i put a 16 V head on my 8 V CX block and it runs good but it taps a lil and smokes a lil whitish smoke when i get on it good.. i replaced the head gasket 2 X to see if that was it but it still does it.. and it wastes oil fast too.. what could be wrong? could the seals for the valves be causing this? cause i have a Y7 head that i think is in better shape that i could put on// would this fix it?
what timing belt would i use . my dx belt is too long for the y7 head??

mike