In the FAQ section -
http://67-72chevytrucks.com/vboard/s...d.php?t=646002
There is a thread on installing aftermarket tachs in our dash cluster -
http://67-72chevytrucks.com/vboard/s...d.php?t=499570
someone also sells the bracket.
Then there is another thread listed there -
http://67-72chevytrucks.com/vboard/s...d.php?t=520520