[jtkk0360]

Thanks for reply. I am no mechanic. I also have a fairly good performance motor. 350 small block, but 408 stroker. Mainly set up for show. All aluminum, chrome, and stainless. Dynoed 522 HP and 519 Torque. I have a custom built aluminum big block radiator , with custom built in aluminum shroud with large electric fan. So it is a modern tank. So overflow should be mandatory in my application you think? Company building car says not necessary. Thanks. Jerry