Possible upgrades from newer bikes

Hi all

I've just finished bringing a '75 K back to life due in no small part to posts on this forum, thank you for that.

A few years ago I bought 3 bikes, a '75 K, a '77 F, and a '78 F. I'm now selling the 77 and 78 Fs but wanted to ask:

Would there be any advantage to swapping out any parts from the 77/78Fs before parting with them? Were there any major advances between these years, especially with forks or carbs?

There is really no reason, most of the f parts would take some work to swap over to the k bike.

In my mind, the best thing that happened to the last two years of the "K" and early "F" bikes was going to the larger drive chain (and of course sprockets) over the K0 to K6. Back in the day, there was a company selling a "Super Chain" kit that was 3/4" by 1/2" that ran on a nylon rear sprocket, best (and last) chain I ever purchased for my K2....wish I knew where to get another.

Ok got it, I really appreciate the input folks thank you.