The heads had been assembled with aftermarket springs and retainers.
Springs were set up at 60lbs on the seat......and 190lbs@ .500” lift(less than stock on both ends).
New springs are 115lbs on the seat, 285@ .500” lift.
Retainers were aluminum....... so those didn’t get reused.
The bottom end is getting a basically stock rebuild...... with a little bump up in the cam dept.