[apalrd]

Assuming this isn't Breakaway-specific (e.g. normal bumper height and no bumps), we have used a sheet metal drivetrain since 2006. In 06 and 07 it had a slight angle to the front to allow it to climb ramps (and 8" IFI wheels, 6wd drop-center), in 2008 it was a flat square, in 09 we had a crab-drive that was still mostly sheet metal, and this year we had a rear chassis pan of sheet metal with a welded skeleton.

The 06-08 one is probably of most interest to you. It's really simple. there are four main pieces that run the length of the frame, each one is aprox. 4-6" tall ( can't remember the exact dimension) and is the length of the frame. They are rectangular. They have a flange on the top and bottom. There are three axle holes in each for a 3/8" chrom-moly pipe, taped for a screw (I don't know the exact size). The two bumpers are the same height as the side pieces, but folded to go around them. There is one chassis divider on the middle of the chassis, going between the two inner sides. There are also two plates in between the outer and inner sides, in between the wheels on the top and bottom. That's it. No lightening holes. The outer plates are designed to be easily removable for maintenance. Each chassis had a different drive (2 fatcim through DeWalt on 06, 4 CIM through DeWalt in 07, 4 CIM through AM Shifter in 08) but that doesn't matter much, it only changes the holes in the inner plates for transmission mounting. I don't know any more specs or weight, but it worked well.

It appears you dropped the middle wheels. That's good. Then it will probably turn. If you don't drop the center wheels or use omnis on the corners, it won't turn. And that would suck.