Jeff,
I have all the billet aluminum stuff, door panels, dash insert, and dash bezel. Mine are
these. They are made by Empire Motor Sports. I went with the polished ones instead of the brushed. This is the only ones I could find polished. They are nice pieces.
I haven't installed the dash pieces yet. Waiting to see how the it turns out about getting the rest of my interior covered to match the console.
Anyway, mine measure 4-9/16" on the big holes, and 2-9/16" for the small ones, to be exact. I'm guessing you are asking to see if you gauges will fit, right? The 5" tachs/speedos, and 2-5/8" gauges will fit these holes. But, and I say but, you probably won't like it. I know I don't. It looks good as hell, but you can't see the top of the gauges while driving. I've looked at too many at truck shows. This is why my gauges are installed like they are.