Radiator Cap , What Are You Useing?

Shroud Could Be An Issue, I Have A Custom Made Stainless Covering The Top, I Do Have A Eletric Fan On The Front Pushing, Changed The Thermostat To A 180, Have Alum Pulleys, Flex Fan Is Going The Right Way, Ran It For A Good Hour And A Half In The 95 Degree Heat Yesterday, Seems Ok? Didnt Get To 200 Like It Used To, Have Not Took It For A Run Yet, Thanks For All Your Help Guys!, Any More Input Would Be Helpful, Tnx!!!!!