If I were you I would be concerned with the wide spread of water temps as well as the pressure. I cant see how gaskets can last with the metal always expanding and contracting can be a good thing...and not to mention condensation issue.
Most standard (auto)pressure systems are regulated with a Radatior cap at 12-15 psi...not saying that head gaskets cant take higher pressures but what a jet can put into the Block psi wise could at any time be to much and cause a problem.
Install a pressure guage at the intake manifold and see what kind of psi is hitting your block at a hard holeshot and WOT.
I have one line going in and 2 coming out...with a Rex Thermostat...I'm always at 160 temp and never see anymore that 8-10 psi in the block.
PS. no regulator on my ride...controlling my psi with the 2 dumps, that ='s happy block psi
[ August 09, 2003, 07:13 PM: Message edited by: HammerDown ]