P1010005.JPG It's a scratchbuilt brass. All these style brass chassis, including this one I have gone to a double thick belly pan. I use .064 brass and after the frame is mocked up, I cut a second piece to put "under" the main pan. That puts the COG as low as possible and really helps get around the corners. The front axle carriers I like are remnants of the 60's. They are the Strombecker or Atlas front frame sections that they used on their open pole motors. I have about used up all the cheap rear axle mounts. For the cars I run on the King track, I now use the forged units. I was bending too many of the stamped brackets. Even when I braced them, they still bent. I have a hard time soldering the tubing that braces everything, so I am better off using a stronger bracket for the rear axle.
I built a few openwheelers using 60's Dynamic inline chassis with a brass belly pan and they run good times, but it is actually easier and faster to just build a simple brass chassis like in the picture. I can kind of clamp it all together and turn on my little torch and get solid solder joints on all pieces. I have a small aluminum block I clamp to the belly pan and can screw the rear axle bracket to. It is ground out at the bottom so I can solder the rear bracket in the correct spot and get a good burn all the way around.