350. 00? I would personally save the 200. 00 and buy an ISSPRO for 150. 00 that plugs into that same plug under your dash.
What most folks do anyway. Use that 200 you saved and put it towards a couple other gauges and a clever mount.
buy a mounting cup like the factory
ISSPRO Model R7602 , R7602C is in Chrome
From : http://www.isspro.com/catalog/ISSPRO Catalog 2006.pdf
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Where'd you pick up those new ubolts?