This is the chart I used when I bought my tires. https://www.cokertire.com/blog/tire-...ross-reference
I believe the conversion info is as accurate as possible. As I said above though, there are size issues to be considered that aren't reflected in the charts.
There is a lot of product info on that site. As far as I can tell, this would be the most accurate replacement tire: https://www.cokertire.com/tires/750-...wall-tire.html It's a bias ply tire though.
They do show a tire that is supposedly a radial tire that looks like an original bias ply. https://www.cokertire.com/tires/amer...whitewall.html
If they make that one in a 14 inch tire, I can't find it.