If your frame is straight, and basically undamaged, any one of the latest crop of aftermarket kits is a better choice than a Camaro sub. The kits can cost less, to much more, depending on the level of show you want, but are engineered very well, and fit. There are even a couple that bolt in, instead of needing to be welded. It is much easier to use one of these, than to cut, true, fit, box, adjust, level, narrow, gusset, re-bracket, etc - the list is almost endless. That is why there is hardly anybody doing clips, anymore. Just my not-so-humble opinion.