car running rough at ideal and when in drive the whole car shakes

I took heads to be shaved put back together now this. My car ran hot a few times kept adding water until one day loose of power and sputtering. I took heads to be shaved,had to tap a couple holes,and thread, one rocker arm stud hole did not go deep enough so took washers grind down sides to fit in rocker to tighten did not torque just tightening rocker until it would not move.it seems like timing is off,could it be from driving a few miles before I took heads off, running hot? please help