Is there a notch on the CAM flange? Are #1 rockers loose? Is rotor tip under #1 plug wire? Is that the original pulley? Is there OT on flywheel visible through hole?
Google Continental brake hose. Maybe big box auto stores. Dealer in a pinch. Easier to put elbows in new hose, wiggle elbows into master, attach hose to res. Put some brake fluid in hose end.
You need to bleed the whole system. Do you have the correct order? How old are brake hoses?
May be a bit late, but it may be easier to replace hoses from res to cyl in order to get elbows installed.
Underside was a big question mark. Lack of photos didn't help. Or wouldnt have helped. Might be a steal, or might need serious resto. Still, if it drives......
Have to wonder why he only went 500 miles and then offloaded.