I've been doing more work on this. Finally got back to work after shoulder surgery as well. I've been a bit busy. Anyway, here it is at the moment. Motor isn't mounted at all. It's just sitting on scraps of I-beam for a very loose approximation.
By the end of this coming weekend, I hope to have made adjustable mounts for R6 rearsets, mounted the motor, and potentially weld on tabs for mounting a rear subframe and at least start on building it. This is all in progress so far. I still plan on cleaning up some of the welds, adding more reinforcements here and there, but I'm stoked that I at least have a rolling chassis at this point.
Does anyone happen to know of any good exhaust headers for the larger displacement motors like this Daytona 190? If I have to make the whole exhaust I will, but if I could buy at least a header premade, it would make life easier.