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earl84 · 08-17-2013, 10:20 AM

LostMy 65, the one I used and installed was indeed the 2 inch, P/N 81316. Chevysdominate referenced the original article that he modified and it used a 2 inch tach as well.
Basically, all you use is the guts of the tach, you take it completely apart and use your own blank plate out of your dash and screw the guts to it after slight modification. It fits well. You also end up having to trim down the inner case and the black exterior case to screw on the back.
Also, I wish I would have done a little more research on the decal material on Youtube, dang it. I think it would have been much easier to print on a different material, like that vinyl waterproof inkjet printing paper, but it did work out OK. Still like how mine turned out in the end, but did have to paint the blank plate the Jade Green to get it to look right, as I wrote up.

08-17-2013, 10:20 AM	#34
earl84 Registered User Join Date: Aug 2011 Location: Montrose, CO Posts: 972	Re: 6000 rpm tach anyone... LostMy 65, the one I used and installed was indeed the 2 inch, P/N 81316. Chevysdominate referenced the original article that he modified and it used a 2 inch tach as well. Basically, all you use is the guts of the tach, you take it completely apart and use your own blank plate out of your dash and screw the guts to it after slight modification. It fits well. You also end up having to trim down the inner case and the black exterior case to screw on the back. Also, I wish I would have done a little more research on the decal material on Youtube, dang it. I think it would have been much easier to print on a different material, like that vinyl waterproof inkjet printing paper, but it did work out OK. Still like how mine turned out in the end, but did have to paint the blank plate the Jade Green to get it to look right, as I wrote up.