I finally got the motor in and started it up. While i was letting the truck run for a few minutes, to check for any leaks,i started getting this little clicking noise. The longer the truck ran the louder the noise got. Now the clicking sound has gone from a click, to what sounds like a full blown knock. When it first started, i thought it was a valve that had just not seated good, so i revved the motor just a little. This is when the knock came about. It kinda sounded like a bent pushrod in a gas engine, so i took off the valve covers and checked the rocker arms,and the push rods, they were all fine. Just put in bearings and checked the torque on all right before i put on the oil pan Really got me puzzled, i don`t know what else to look for. any of you guys run in to this before ? Thanks for any help