Locked out distributor...

My timing has been locked (currently 36 degrees) for around 12 years with a start/retard box. I also have a 3 position switch that gives me the ability to activate the nitrous retard (currently 10 degree pill) without activating the nitrous. The only time I use the retard for casual driving is when i'm cruising at low speeds in town at low throttle angles, the lower idle speed reduces the annoying low speed bucking I get due to the lash in my faceplated transmission. I can flip the switch at any time during casual driving to see if the engine prefers the retard on or off, engine always prefers no retard. Low compression on Shell 92 pump gas, gets 20mpg.

Grant