Id like to see how you mounted your monster tach in your 70-up a-body

Like the title says I'd like to see some pics of how some abody owners mounted their monster tachs in their cars. We have one but theres no dash pad in it so mounting it was easy, but my 74 duster is getting a dash pad after I paint the dash black and while I'm reinstalling the all the gauges stereo etc I'd like to mount the monster tach so I can get the whole dash done and wired in a day then I can move on to the rest of the interior.
Thanks alot,
Jr.