Nope, actually I couldnt really hear or see it doing anything. The wires looked good physically, hence why I never replaced them. But now that I have replaced them, the problem has gone away, so something must have been wrong internally. I didnt know how old they were or if someone simply washed them off to look "new" when they sold me the truck, but I wouldnt doubt it. Well, at least now my truck does have a complete tune-up. The truck did have a very slight ticking noise, but when I reduced the spark plug gap to .035, it went away just like it did on my Toyota's 22R. If you want to hear a 22R sound like a lawnmower, leave the plugs at a .040 gap and let it run. .031 sounds a lot nicer at 55. I hear ya on how much nicer it is to have new wires. I think if the guy who sold my truck to me had put new wires on it before selling it, he would of been able to get more money for it for sure, but heck, I'm not complaining about the 1,500 I paid for it. It only has 138,000 thousand, with a clean, non-oil consuming 350, clean 700R4, and nice chrome rims. I've put about 500 in 31" tires and parts into it, and now it is totally worth it. It does impressive burn-outs when pressing the pedal to the floor so that some a-hole doesnt take your gas pump
. But yet - I am used to inline 6 and 4 cylinders, it doesnt take much to impress me..