Are suspension parts differernt for a V-8 K frame and the slant 6 K frame?

I have front disc. Its a 73.
I would be adding a sway bar. It didn't come with one.
I wouldn't get that for awhile anyway. I just want to get this car road worthy first.

What size bars should I be looking for?

I know quite a few guys on this forum bought the 1" because of the price @ $199.00.