I'm not sure just how big they go, but I've seen hole saws up to 4". I am going to have to make an instrument cluster for the F@rd project in my sig, I'm planning on using a sheet of alluminum plate that I have, and using a hole saw and saber saw combined with a die grinder to cut the nescessary holes in it for guages from a 68 cutlass.
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67 K-20 350, SM465, Eaton rear, 4.56 no spin option
00 Dodge 2500 4x4, 24V cummins, 5 speed
Chad
South Central Nebraska
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