225 with the head left off for a year... can it be saved?!

if you want to do it cheap,I would be inclined to get a 3.5 inch ball brush (flex hone) and a with plenty of light penetrating oil on the cylinder bore walls and the piston at BDC
Use the ball brush to clean up the bores and reestablish the cross hatch on the bore walls. Power the ball brush in a variable speed drill, with a fast up and down motion at a medium speed you with get about a 45 degree cross hatch.
Use a Scotch Brite pad with an ample quantity of wd 40 to scrub the top deck.
It will run fine.
Question: why the head studs?