I just finish my ZC swap. I had the timing right but it slippedfrom 16 degrees to 10 degrees. Now that we have it set back again it is making a aweful nnocking noise. I will try to set it back to 16 degrees agian. But if my valves are bent? is there any USDM valves that will fit? Say 88-89 Integra? Any body got ideas?