Has anyone experienced an engine "rattle" in s-10 p/u that may occur in 2000-2500RPM range, under a moderate to heavy load, with a warmed-up engine?? Rattle would get louder w/ accelration. I thought it my be the lifters & replaced them. Not the problem. Push rods are ok as well. Pretty sure sound is coming from upper end of the motor. Any help would be great.
Thanks,
Mark

Haven't had any issues like this with mine.