K-memeber ??

I have a 67 Valiant that came stock with the 273. I'm looking at a 75 Valiant slant 6 car for the K-member, so I can do away with the 67's odd steering Idle-arm. My question is there any difference in the K-members between the stock slant 6 to the V-8 or is it just getting the proper engine mounts???

Thanks for the help.