Hi Folks, Just a quick question as I put my '52 GMC back together. The radiator I have is not pressurized, which seems to me like a bad idea. should I modify it to hold pressure and run a 6 lb cap, or leave well enough alone? I am running a stock 270, and live in 100+ degree summers. I have an old Brit car that won't make it to the end of the driveway without a 13lb cap and a big electric fan... Maybe the unpressurized system works fine the way it is? Thanks, Tom
