Had a cylinder to cylinder blowout after only 50 runs with the white 440 source gaskets, was thinking I'd step up and put Cometic mls gaskets on. Jegs has about 20 different variations listed, anyone know what size and thickness I should order? The motor is 12:1 590mp cam, 180psi cranking pressure. Runs 11:50 in a 4000# car. Thanks for any help.