I have a 93 D250 and I am thinking about installing a tach and a pyrometer. I'm trying to figure out where to mount them (especially the tach). Does anyone who has done this have any suggestions? Also, I think there's a harness under the dash to wire the tach, but what about the pyrometer? Any input would help. Thanks.

 

I have my tach on the column.

There are no provisions for the pyro, you have to puzzle something out on your own. You can steal power, ground, and dimmed light from the tach plug if you want.

 

I have a pyro and boost guage in a pillar mound guage pod and I plan on installing a tach on the steering column. On your truck there should be a harness for the fact tach but the pyro will have to be done from scratch. It's not that hard at all, when you buy the pyro they will give you everything needed except for the drill bit and tap for the probe to go into the manifold.