Here's a link for others to JJorgensen52's build where he mentions the hardware with some pics. Scroll down to pic 2 & 3.
http://67-72chevytrucks.com/vboard/s...1&postcount=70
We are looking to duplicate the same hardware you used Jim. Are those bolts 7/16-14X? & 5/16-18X? and would you use the same thread pitch & length again, or? And BTW The "Red Herring" gauges look amazing!