Check your timing to see if it is retarded. After you make sure it isn't, stop worrying and DRIVE THE CAR!

How hot is too hot? If it pukes green blood out of the radiator with a new cap, that's too hot.

Running a little to the right of center on the gauge? So what? The gauge is not a precision instrument...just drive the doggone car. You may find that it even runs cooler after a few thousand miles.

Enough with the worry!
R.