For the pressure gauge you can use the spot in the head where the sender for the idiot light is located. If you do that you will lose your idiot light, don't know if that matters to you or not. Personally I opted for the sender relocation kit from 42 Draft Designs. It mounts to the oil filter flange, and allows you to keep your idiot light. About $45 last time I looked.
I never have done a temperature gauge, but it seems I remember seeing a few posts on here about it. IIRC guys were mounting the sender in the oil pan somehow, either by some sort of combination drain plug/sender unit, or directly drilling and tapping the oil pan.