As soon as I was ready to put in a local for sale ad for "Brutus", my '77 Crew Cab, the slight noise that I began noticing a month back, became louder, and now it's knocking. So much for my excellent running Goodwrench 350 that I just put in the truck in October. Never had a motor run as smooth as this one did, never used or leaked a drop of oil; sure it was gutless in a 1-ton Crew cab, but it ran good otherwise. It only started knocking to re-complicate my schedule of progress again. Thats 6 motors for me that have gone from fine to bad during 2004.