Tires..Pre-metric size conversion?

I am looking at a set of GM rally wheels, with rubber on them. The tires are inpretty good shape, and should last several more miles.

The problem is the size's listed, are not the current metric sizing, and I am wondering if anyone knows what the conversion may be for them?

G-60x14
F-60x14

I need to know if they are like say a 205-60r14 or?

Thanks!:)

http://www.tireguides.com/tip6.html

Thanks Bob!
That's just what I needed!:)

Ooh, my truck came with bias ply tires. L78-15