I just recently put a 6.5 in place of my 6.2 and want to put some pyro/boost gauges in where is the best place to put them. Can you get pillar gauges for a 82-87 chevy.

 

not sure what yr 6.5 it is but some info on that

Here is how I did it, step by step.

1. Remove the passenger side battery (and insulate the positive end)
2. Remove the airbox.
3. Put the passenger side up on a suitable jackstand and remove the wheel.
4. Remove all of the 13mm bolts that hold the inner fender in place.
5. Remove the nuts that hold the passenger side battery tray in place.
6. Remove the small screw that holds the front lower plastic in place.
7. Carefully push the hose retainer plastic prongs through the inner fender.
8. VERY carefully (it's SHARP) rotate the inner fender forward and down while ensuring you have the front clear of the bumper. Did I mention it's sharp? Don't worry.. I'll heal.
9. Wiggle the inner fender down and around until it comes free.

Now, You have TONS of room to work with. I decided to string the hoses out of the way of the turbo inlet to drill and tap the "boss" that is now staring you right in the face.

Get faceshield, drill, center punch, drill set, tap, cutting fluid and gloves together.

10. Centerpunch a starting mark on the exhaust boss.
11. Start the truck (set the brake) and drill the first size hole (I used 1/8")
12. Drill the hole with bigger sizes in steps using lots of cutting fluid and stepping up in size until you reach the size the tap calls out for.
13. Tap the hole (careful, things are getting warm by now out of the exhaust)
14. Shut the truck off.
15. Mount the adapter for the thermocouple.
16. Mount the thermocouple in the adapter.
17. Start the truck and check for leaks.

If no leaks, reverse 1-9 to put the thing back together. Enjoy knowing how your engine is performing.

hope this was some help