well this might seem like a noob question but i cant mount my engine to the engine stand because i dont have this one bolt. it kind of pissed me off that it wasnt even there to start off with along with many other bolts. can someone give me the size of the two bolts pictured near the bottom left corner on the front housing. also is there something suppose to go in that hole in the top of the rear rotor housing? and my last question is where do i get various sensors like the knock sensor, oil pressure sensor becuase mazdatrix is wayyyy overpriced for a sensor. thakns