Originally Posted by A/MP
Being a cabinet maker, I thought about a straight edge on each flange and measure the diagonals for and aft of the housing in general. That work?

Absolutely thumbs
I measured off the ends of the squares instead of across and over the housing, I like and use the KISS principles thumbs grin

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)