Tuning For Detonation
175 is not out of the park crazy.
Especially in a light weight vehicle.
Do you have the dynamic compression? If so, the various on line DC calculators use different values for the intake valve closed point so it is important to know which one was used.
Also, you mentioned that the timing mark on the timing chain cover is off.
Are you sure it is the mark on the cover that is off? It could be that the outer hub on the damper has slipped. You may want to get your piston stop out and find out where TDC really is.
