The threaded end that screws into the spark plug hole will have a valve right there inside that threaded end. Auto tester is fine. Pull rope until the reading stops going up. 130psi-150psi is pretty normal. I had a 266 that fired right up and ran good at 110,thought that's low.
For pressure test, plug exhaust and intake(I use rubber from inner tube between muffler and intake block) and apply pressure of 6-7psi. Should hold that psi steady for a few minutes.I apply through plug hole with piston in down position. You are trying to pressurize the crankcase,not test the rings. I first use air compressor and turn it down(6-7psi) to get a constant air flow. Leaks are much easier to find this way. When it seems no leaks are found,I use hand pump like mityvac to verify the motor is airtight at 6-7psi.The search function will give all info you would need to perform this test.