[BruceWilkie]

Originally Posted by Skip Fix

The speedo and tach holes are 4 5/8 so probably not a punch for those. 2" will get the other gauge holes and 0.5 for the turn signals. I have a hand nibbler that didn't do too much.

I looked through some of the pages and saw one at 5.625" (page7 or 8) Think they go to 6" On-line list in previous link doesnt list them in size order.

http://www.greenlee.com/cat_docs/Holemaking.pdf actually a better catalog here and yes up to 6 inches

[Skip Fix]

Well I cut the engine turned piece with the jig saw. Clamped it to a shelf board and it was fairly thick anyway. The back piece my hand nibbler did Ok, it was thinner and on the back doesn't have to be as pretty. Now to try and clamp them and use a hole saw. I have a tool a friend has for cutting AC ducts that has a side cutting bit and a center spot to pivot around I may try for the big holes.

I jammed one of the old Sun tachs into the factory tach pod my 409 Impala had back in the 70s. Fit just right. Better than the factory tach.