The Park chain wear tool was only $10. After reading all the above I am convinced that I will replace my Trek chain with another around the same price($27). As for the older vintage 10 speeds I guess I will keep using the Bell chains for those unless I get a comparable deal on Ebay or somewhere else.
Usually when I restore one of those older bikes I am trying to keep my costs way down so I can at least earn a bit for all my time and labor.