SR Guru's,.... HELP!!!!

[2stepGoesPowPow]

my redtop ran on a single mishimotor 14, or 16" fan. never had cooling problems, switched to a gt2871r, 740cc injectors, tune, tomei expreme manifold, etc and now i was overheating after i drove my car like 12 miles. with that fan however at night when its 75 and below i didn't have a problem, i thought id fix it with Isis dual 12 inch fans and metal shroud, apparently that made it worse..... i overheat now after 7 miles, and at night its not really any better......., I just put in a nismo thermostat and I've always been running a mishimoto radiator. some people say i have blown head gasket but theres no smoke out the exhaust, or "milky" oil. so my last resort is I'm waiting for my clutch fan and shroud to come in the mail and hopefully that helps. i also use stock hood with no hood scoops or anything, and my exhaust manifold has no heat wrap. my fans are also working by fan controller that i set as low as possible turning on at 140 degrees.