I actually don't think that will work. I am almost certian all F bikes ran 630 chain from the factory, the up until 77 I think the K bikes used the 530 chain. However some people did conversions on F bikes and went to 530 chain. I think it would be best to measure your current chain before you buy. I'm certian if you google chain size you will get dimensions for both chains and you can compare them and find out what you have before you buy.
Just my .02
Travis