Used 3 3/8" Stewart Warner 8000 RPM Maximum Performance Series Tach in good shape.
Work perfect when I took it out only to use my factory tach.
It includes the brackets. (the metal bracket around the tach was red & I painted it black & might use another coat of black to cover the red again)
It has 4-5 inches of wiring coming out of the back.
$50 & that includes shipping.