Well, got deep into the motor today and all I gotta say is WOW. For starters, an A motor is super complicated. Valve bodies and big oil pumps and all kinds of weird stuff. The second part I couldn't believe is the amount of rust inside it for an engine that wasn't locked up. The rods were covered with rust. The wrist pins were rusted to the rods (required a hammer). Total mess. Good thing I'm taking it down to empty cases for this build.
The frame's an Amen rigid frame from back in the 70's. It's roughly 2" of downtube stretch and about 36* of rake. The forks on it are +6 and it sits just a little nose up without the engine (oughta be just right when all's said and done).