[Aussie Mike]

WARNING: Long boring post about Chev engines.

I bought some Autometer mechanical guages just before Christmas. I've always liked 270 degree sweep mechanical guages as I reckon you can more easily see a change than on a 90 degree sweep elecrical guage.

Another thing in their favour is that mechanical guages are not subject to the vagaries of electrical systems. Varying voltages and suspect earths can have a significant effect on the accuracy of electical guages.

One thing not in their favour is plumbing them in. The electrical guages win hands down here. Screw in a sender and run in a wire, how easy is that! This is probably why electrical guages are so popular.