On the fuel pressure test - while youre teeing in the gage, what I do if any doubt is, run the fuel pressure gage all the way out, snake it thru the hood and hook it in the center of the windshield with the windshield wiper or something.
Make sure the fuel lines wont get cut by the hood or other, you don't want a gas leak under pressure, that's why you don't run the gage into the car ever.
I then take the car out and floor it on a long run, watch or film the gage with a camera. Lots of old iron will have fuel supply problems after say 10-12 sec at full throttle. Unless its REALLY bad, that is not likely your problem (yet) but good to check while you have the gage on it.
