Thanks, Chip!
The origin of the subframe is unknown - it was on the bike when I bought it. It's funny, but my tuner says the plastic is less likely to leak than an aluminum tank! Ah well, what I have is working, and I'll leave it for the moment.
The SV forks are shorter than the stock MZ forks, and most of the guys who race these things on the West Coast had at least an inch of stock fork tube sticking up through the triple. So the SV fork is almost exactly the length that I had the MZ forks set at. Even with that much fork tube sticking up, steering was indeed quite lazy, with conservative geometry, and I didn't run a steering stabilizer. So we've basically got that same geometry. But we had the steering damper on hand, and just figured better safe than sorry. In the pic below, you can just barely make out the right fork tube sticking up through the triple clamp.
Right now, I don't know the shock length, but I can tell you that the unloaded swingarm angle from horizontal is 11.5 degrees.
Once this part of the project is complete, if I can prevent myself from immediately putting on a full TZ250/Ducati848 fairing, one of the things I want to experiment with was inspired by you, Tex. Twin Works Factory over here makes a little adapter allowing you to put some early GSX-R brake calipers on a stock SV650 front end. I might try going with one of those calipers and a nice master cylinder, and see if I have enough braking power to allow me to eliminate one of the rotors and calipers on the front end. It would definitely be nice to lose that kind of weight.