Funny stuff about adjusting rockers while running. I was taught to adjust solid rockers while running...about 1962. Tricks are to set idle way down. As slow as you can. Normal operating temp. Use a 5/8 box wrench and a screw driver. And keep as limp and light touch as you can. Intakes, to no noise at all. Just. Exhaust, to just can hear a light tick.
Hydraulics, Normal operating temp. Adjust until quiet and 1/2 turn more.
Cold engine, use the feeler gauge and adjust each cylinder at top dead center.
The tech. tip about #1 at top dead center and #6 at top dead center is so much easier. No hot engine and no oil all over the place. All are bit of work and all get the job done. But hey you don't need to develop "the touch" or any burns with the tech. tip. Now that tool would have changed every thing.
