Over the summer, on hott days, the 400 sbc would get pretty hott(Around 200, usually 180 on a cooler day). I found after a couple days of the hot weather, I would be down on coolent due to it pushing out the over flow tube but not returning due to no over flow tank. What kind of tank are you guys using? Thinking some old to keep with the times. Something glass would be cool if I can keep it from breaking. Let me know what you came up with.