here is my predicament.... i got the oil pan on the other night and the motor back in my truck but now i can t get the oil pump drive shaft to line up with the distributor! it engages with the cam and it seems to hit the shaft. when i had the pan off i could get it with wiggling the shaft from underneath but now i can t get it to seat all the way! and how do i know if the motor is back to TDC so i can set the timing? is there a certian way to do it before i fire it?