@panterapatt posted:Comments to your setup - ..
why ?-
to further foul correct operation and make something simple very complex.
I think keep it simple on these cars and the cooling system.
Oh well. things were done . 
just going to record what I did today.
got a 13 cap to replace 7
jack front up (cleared tires)
filled the pressure tank to top, cold
idling under shed, slight breeze blowing through. cool.
with in a few minutes coolant came up to 180, during this ramp up, the 13 cap relief peed coolant.
using a contact probe, the swirl tank was about 5 lower than Sniper coolant (sender front of block)
the fans came on when radiator outlet temp reached 150F
over the 30, 40 minutes idling, fans running, the coolant creep up to 200F with the radiator outlet slightly under 170f. (another problem that over shadows my concern of coolant system is the alternator is insufficent to run fans, thus draining battery durring run, even crusing)
after shutting down, there was no gurgling nor puke.
the amount peed was 20 ounces (40 in^3). that coolant was cloudy brown, not clear green
after cool down, pressure tank level down about 4" (about 40 in^3)
the other (main) reason for idling was to test the gates heat shrink "clamps" with increased pressure before risking a leak on a drive. (the reason for the 7 cap)