[blykins]

You do not have 245 psi. On a pump gas engine with a fairly large hydraulic roller, you will see about 170-180. I think your 180 psi number is correct and the others are incorrect. Were you holding the carburetor wide open when you did it?

On the valve guide clearance, the only way to do this properly is to use a micrometer to measure the diameter of the valve and then use a bore micrometer to measure the guide clearance. A brand new guide/valve will have a lot of wiggle in it because the clearances are .0015-.0020 right off the bat.

A clearance of .030" or .040" is THIRTY THOUSANDTHS or FORTY THOUSANDTHS and is not correct.