Good posts Clinebarger , Graywolf in the last pic in this link...
http://67-72chevytrucks.com/vboard/s...5&postcount=48
it shows the BTO tv made easy if you look close. I had the universal crap on it before and it was cheap junk had to ty-rap the housing at the bracket to hold it. The black hose near the firewall is for the pressure gauge tester. A little pricey but good insurance for you and support from BTO.