ok latest is i have a spare 68 ohc, so i took the oil spring from it and installed it in my pump .started it up and ran smooth. tried to set it up and ran it at roughly2200hundred rpm and it started running rough again.
now with the change of the oil spring tells me that the tube in the cylinder head is wrong. the machinist did not remove it so its stpck ,but through some research and web sites the prblems from the factory.1966-1967 all ohc had this issue the orfice that feeds the lifters is to large,therefore alowing to much oil in. so the machinist is gonna correct the prob. since he missed it the first time.now the burnt valves from last rebuild is caused from the same issue,the valves were being held open there fore burnig them out.i thank all 4 your support and hope this might hlp someone else in the future.wonder y pontiac discontinued this engine