[Rick Parker]

I have found the holes cut by a hole saw in aluminum do not turn out real accurate and require alot of massaging with a file. If you have access to a machinist or can do it yourself in a Bridgeport/vertical mill, attach the dash panel face down to a 2x10 board about 5 1/2 ft long. Layout the gauge and hole locations on the reverse side. Attach the panel further with screw in the center of the proposed gauge centers. Then use a very slow speed and an adjustable cutter. You can adjust the cutter to remove the EXACT amount to make exact diameter and fit. Just be sure the speed is slow because if the cutter catches the metal it will grab and damage the panel or possibly cause injury.

I recently did this and was very pleased with the results. This is the best way to locate the holes where you want
and have very little additionall fitting required.

Just a thought ...........Rick