k frame difference?
If you've got a 73+ K frame your best bet is to stay with a 73+ K frame. Lots of folks switch the 73-76 K's onto earlier cars. The biggest difference is the engine mounts and the sway bar going through the K on the 73-76 pieces. If you do switch, you have to use the sway bar for the year you choose. You can swap the steering components and use 73-76 parts on a 67-72 K frame, but you have to switch everything (pitman, idler, center link).
Here's a couple of pictures
'68-72 (67 had a one year only idler arm mount, but otherwise looks the same)
'73-76
If you've got a 73+ K frame your best bet is to stay with a 73+ K frame. Lots of folks switch the 73-76 K's onto earlier cars. The biggest difference is the engine mounts and the sway bar going through the K on the 73-76 pieces. If you do switch, you have to use the sway bar for the year you choose. You can swap the steering components and use 73-76 parts on a 67-72 K frame, but you have to switch everything (pitman, idler, center link).
Here's a couple of pictures
'68-72 (67 had a one year only idler arm mount, but otherwise looks the same)
'73-76