I saw a set of these gear boxes today and I'm really disappointed, the coloring is horrible, if you look hard at the alluminum you can see a TON of imperfections, and the worst part is they weigh a ton.
I'm glad someone finally made a set of alluminum gear boxes that are reasonable in cost but these are definatly not geared towards a racing crowd, they may be perfect for rock crawling or if you want to spend the time pollishing they could make for a nice shelf queen, but I just don't see these sticking around long.
...now maybe if you had the time and wanted to machine out some of the extra alluminum to lighten it up and maybe slot the motor screw holes then you might have a good alternative gear box for your race truck (that gives me an idea)