Are there any instructions for what to do to keep the subframe from rusting corroding if it has not already?
Isn't it something to do with adding a line to reroute the a/c condenser drain line?
Just looking for info on how to do that and where that line is so I can reroute it.

 

Can't help you with the rerouting but if you are starting to rust get some Por-15 here is the link. This stuff is great, read and follow the directions and it will stop the rusting. If the area is not visible in the sunlight you don't need a top coat. Minimum prep. lasts forever.