When I first looked at this rig... the motor was knocking ... I drove the truck home...it backfired...then it started to run smooth.. by the time I got the rig home..it was running like a kitten. /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif I think the motor that was JUST installed...had a sticky valve or something.. or it JUST likes ME!!! /forums/images/graemlins/thinking.gif 86 K30 noisy 350 motor...(needs replaced) d60/14bff 4.10's /detroit rear sm465/205 hydro-clutch The frame is a little rotted in the rear... what do you guys think???