I went ahead and deleted my OP because I answered these questions myself. Apparently the stock MR gauge cluster on the bottom is what is being sold on various sites as the "radio relocation kit". I went ahead and moved my gauges up into the radio spot and changed them so the boost gauge was the closest one to me with just a screwdriver. I'm just going to order an aftermarket mechanical boost gauge and drop it right in.

 

bump

 

Deleted

 

BUMP...surely someone has done this.

 

you will be able to use the vacuum line, but you will need to rewire the illumination wire, ground and power. (if available)

 

where did you find a 42mm mechanical boost gauge?

 

I didn't have much luck with it, so I just put an Autometer pod on my column with a 2" 1/16th gauge in it. I really don't like having a dead gauge in my dash though, so I'm trying to figure out what to do with it. I might put my boost controller in there or upgrade to the Autometer 3 gauge dash pod and put an AEM wideband in there. I dunno yet. I found a few 1" 1/2 gauges that will fit in the stock pod but they seemed little too cheap for me. The one good thing was that on the MR you already have a 3/8 boost line run up to the dash, so I just put a tee in there, ran one line to my new gauge and the other to my boost controller so it saved me a step. But if you REALLY want a boost gauge that fits in the stock location, then here you go http://www.marshallinstruments.com/products/W.cfm

it comes in a 0-30 psi

 

If you want a boost gauge that fits then you need This one....the stocker is 42mm..you have to dremel out the stock hole just a little bit..