i just changed out the gaskets in my intake manifold and when i plugged everything back in my fuel gauge and my oil pressure gauge are not reading. They are just pinned on the right side. What should i check and where is it located?

An open circuit will cause a gauge to read maximum. Look for a connector that didn't get plugged in or a blown fuse.

i checked the connectors ill have to recheck the fuses but i believe they were all good aswell i was thinking a possible broken wire in the harness???

Year, make, and model, and I'll check the wiring schematic for a likely spot to look.