Ok, I put 3/4 inch high density foam in, but, I recommend 1 inch instead. I think I will switch mine to 1". I used my cheap grab tool to set the line. Here are some pics:
I put the two big house fans in front of the Chevelle and ran some tests from cold start. My gauges are still charged with freon, so, no worries about air in the system. Here are my results.
Engine off - low side, high side - 92 psi, garage temp 93 deg. ambient.
low side, high side, vent temp, approx. time
34 psi, 148 psi, 49 deg. - 1 min.
32.5 psi, 152 psi, 47 deg - 3 min.
31.5 psi, 155 psi, 46 deg. - 5 min.
33 psi, 173 psi, 46 deg. - 8 min.
33.5, 188 psi, 48 deg. - 10 min.
36.5, 200 psi, 50 deg. - 12 min.
What do you think about the freon quantity ? The system tried to stay at 46 for a while, but, then, the pressure started going up and it could not maintain 46 deg... The times are approx... I noted down the numbers when I saw things start to change. It looks like the best numbers were 31.5, 155 with 46 deg. vent temp...