i drilled/tapped a 1/8" npt hole in the side of my manifold that didn't have the egt probe. then, just an 1/8" compression fitting to copper tubing with a couple coils (heat dissipation), behind the engine, 1/8" compression fitting to hose barb, about 3" of rubber hose (noise suppression, before i did that i had a nasty click at the firewall), hose barb to bulkhead (through the firewall), plastic line to gauge. been running like that for a while with no problems. except now having the knowledge that i was REALLY working my turbo before i put it in. check "old smoky"'s readers rigs for a good pic at the manifold.
dave