Realize that putting the SS brake lines on the front only, you will still have the compliance of the rubber lines in the rear, and won't feel a difference in your pedal until you do those as well.
The endlinks on the front don't really have bushings, but with 215k on them, they might be a bit worn. I'm not aware of any difference between any front endlinks, but if you need to replace them, see what's out there. Check the joint boots for damage, and look for play in the joint. As for making your own, I'm not sure it's worth it. The last thing I'd want to do is make the front end stiffer. Oh yeah, if you're replacing the front bar bushings, I'd go with OEM rubber (and put the ES poly bushings in the back).
Be sure to check the other linkages up front, as well. 215k is a long haul. Tie rod ends, etc.
HTH.
