If engines are running at normally operating temp, and you have a decent flow out the exhaust, and its not leaking, then its good.
Your pressures sound realistic.
Pressure could rise if the heat exchanger is clogged. And you cleaned it.
The raw water pump is going to pump whatever it can in gallons per hour at a given rpm, these are not specified for pressure, more like flow. the raw water system will have little backpressure, water is just flowing in, through, then out.