Well, I haven't done much to the zhp but I can and have done just about anything mechanically that is not internal. Internal as Ive gone is waterpumps and timing belts and distributors. Pretty good finding shorts in electrics and hooking up stereos. Like I said most everything except internals of the engine, but I have an m20b25 in my back yard mocking me to open it up and make it capable of turbo.