Sounds reasonable, although I don't fly at that RPM. Once warm, my oil
pressure hangs in around 60 psi. 90 sounds high for a warm engine. I
also have a cruise pitched prop and climb about 850 fpm at sea level at
gross, or 1000 fpm with 1 or 2 on board and gas. In cruise, I don't
need any rudder, only for climb and descent, and rough air. If the rest
of the plane flys straight, you may need to tweak the trim tab. Just
got mine out of annual and am ready to take off. Once I can afford the
fuel.

Joe
'66 Super III