After you weld that up you want to add a gusset from the hanger to the frame rail.http://www.google.com/imgres?imgurl=http://i119.photobucket.com/albums/o159/ocdropzone/frame/hanger_gussets1.jpg&imgrefurl=http://www.pirate4x4.com/forum/toyota-truck-4runner/1956610-latest-my-88-a.html&h=400&w=600&tbnid=WDmMYzQgOzraQM:&zoom=1&docid=trvAa62ShZJf0M&ei=ROo-Vf6eIMWpogSRkYD4AQ&tbm=isch&ved=0CEEQMygaMBo if this link works it shows what Im talking about. Not my work just a random photo.
 Also the ends of your hanger are hanging out there unsupported. I would weld a piece from the new hanger, to the old hanger, to the edge of the body mount bracket. Hope that makes sense.

makes perfect sense, thanks.

Wow, I haven't seen cracking in that area like that. Im curious what the cause is. My frame has some cracking in the more typical area of the front frame.

I would really like to kjnow as well.

i'm surprised they don't sell the SAS kits with all the necessary gussets to add support. after thinking about this, it seems that there should be more than just the hanger basically hanging out there on teh end of the square tube as it's only support.