If you can R/R the cam leaving the towers in place, go for it. The guidance is that the new cam needs to turn freely when installed.

I recommend bringing the engine to TDC on #1 before starting to dismantle and marking the sprocket and chain with a dab of paint.

Not sure of your reasoning on oil supply or bad rockers causing the problem. A flat spot comes from "slap" caused by a weak ball stud, which in turn can wear the rocker. You may wish to consider replacing those ball studs.

And you are of course going to install new plastic pieces on the oil tube.

Hate to see you have to go in again after all this work.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe