'83 280zx Oil Presure

Hi,

I took my 280zx into the mechanics a few weeks ago to get the head gasket and exhaust manifold replaced, and since getting it back I've been noticing that the oil pressure has been going really high when I accelerate.

Assuming that each notch on the dial is 15psi, I'd say it goes up to about 65psi when accelerating, and drops down to about 30psi when stopped at a light. I certainly didn't notice this much variance before getting the work done.

Is this acceptable behavior for a ZX, or should I be concerned that something was not done correctly when the gasket & manifold were replaced?

Many Thanks for your replies!