[airdale94]

You don't have to swap the x-member. The only advantage that gives you is the updated engine mounts. And the 67-72 can be adapted easy enough. The upper control arms are the same (basically) but the lowers are disc brake exclusive. They have different turn stops. midnightblues is right the center link is different and as you found out the tierod ends. As far as caster what's your shim stacks look like. You should be able to just put more in.