"bottom face"= china wall front and rear?

If so, yes, normal.

Stock used a cork gasket to take up the space, or fill with RTV like most (definitely not all) modern builders, whichever seems like a better approach.

"I have to shave the faces about .060 and not sure to keep the same or get them same angle as port face."

Faces=intake port flanges?

Sounds like you need to cut it to fit and use RTV on the front and rear china walls.