273 Rocker Arm to Shaft Clearance

Post #12.
Assuming room temp of 68* F & r/shaft & rockers get to 178* F [ probably a lot less than this ] = 110* F temp change. Being generous with the numbers.
Shaft is about 0.88" diam from memory. The lineal increase is.....drum roll please.....0.00044". Less than half of one thousandth of the available three thou clearance. And that is NOT allowing for the expansion of the rocker. As I said in post #9, I do not see a problem.....