Just the normal stuff. Look down in the lifter valley with a flashlight the best you can for anything that looks wrong. Look at the pushrod tips for heat discoloration. Spin the pushrods with your fingers to see if they're bent. Look for broke valve springs. Sometimes these are hard to see. Make sure the valve seals haven't rose up off the guide. Retorque the rocker shaft bolts. (If yours are 5/16" it's 22 ft lbs. If they are 11/32" it's 30 ft lbs.) The rocker plate bolt torque is 50 ft lbs. Spin/look at the rocker roller tips. You can retorque the heads if you want to.