just last weekend I was finishing putting on my timing cover & I couldn't remember which way the seal faced, so I went to my stash to look at an old cover & there with it was a spacer, chain & a slinger. Went back to the 64 & sure enough, the slinger was on the work bench. At that point it wasn't together but I surely would have forgot it.I like to just work on it a few hours here & there but it is so easy to forget to tighten something or leave something out. I guess I have to start using a check list. Glad it runs again. That cam chop makes it all worth while.