im workin on my control arm back frame on my hardbody. i used 2x3, here are a few pics the first one shows how it was connected to the stock frame(stock frame is boxed in). the plate on top was to help fill the gap and have a better fit, and also so when its all ground down it will blend better......right now it has no flex puttin a jack under it and liftin it holding the engine weight and all..i still plan on plating the inside and possibly the bottom when i pull the motor just for added strenght.
http://nissanminis.com/album_pic.php?pic_id=21025&sid=482c43e4aca7e287cd61379b04652206
http://nissanminis.com/album_pic.php?pic_id=21021&sid=482c43e4aca7e287cd61379b04652206
http://nissanminis.com/album_pic.php?pic_id=21022&sid=482c43e4aca7e287cd61379b04652206