I dont know about your engine, a 228 I think, but the 270 has a small line that enters the head at the front which supplies oil to the rockers. It has small orifice in the fitting on the head. Be sure to check that this is clear for oil flow. It doesn't take much to plug it.
Fuel filter- just change it and you know its clear.
Brakes- you should have pressure in the system when you step on the pedal.

"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150