Since it's a junk yard motor,that may have sat for a while.........
The clutch disk may be STUCK to the flywheel. I've seen it happen before.
Try stepping on the clutch,put in top gear, then crank with starter, park brake on.
May break loose.
Or, start car in 1st gear, get it roliing fast,step on clutch pull up park brake,and maybe some gas .