Yes I have the dash completely out, i'm doing a ground up resto on it, Here are a couple of pics:
Without the cover:
What I made to put the gauges in:
it's 9" long, 3 3/8"wide, with 1/2" flanges on each end.Some minor grinding on this was needed and some cutting on the bottom the cluster itself was needed.
First thing my wife said was "it's not centered, then once I put the cover on she saw why.