A boxed frame is heavy, cost$$ and only returns a small improvement in anything that matters. This is true if sad. BUT if you could have 90+% of any boxed frame benefit for only 2 hours of labor and 1% of the cost$$? Thank the member who hates posting but wrote me a PM. The Metal Store: M-F 8am-4pm; Order Online or Call (216) 663-0458. You must measure the C-channel carefully for easy installation but you'll buy 3/16" steel plate, cut somewhere around 3" X 5" of your car's C - channel. No need to lift the body, no issues with heat. 16 pieces will do a sedan, cost ~ $100.00 U.S. if I've got the $ conversion rate right. Then weld in half on each side roughly equally spaced. You'll alter the leverage points of the frame which now is about as strong as a 2 X 4 that long bent over a saw horse ( from roughly the distance of your wheelbase) to 14" (Like really stronger). If you are crazed you'll cry about the added weight. Each steel plate weighs a few ounces. If you are crazed you could use a frame machine for an hour to get your frame closer to spec but they might commit you. Sunday Go To Meeting Cars (or Taxi's or The Blues Mobile's) Forever. You hate this? Shut up and ignore it, you're already on the ignore list.