I have a 1999 Silverado 1500 w/ 4wd, I am on the lookout for a new frame because I have recently found rust holes through the frame. Does anybody know where I can get one? I was also thinking about throwing a 2500hd frame & suspension under it because I am doing a lot of towing and hauling, I already have a 4l80e and when the engine blows I plan on putting a 6.0 Vortec in it. what are your thoughts on that?