hey, one way to get better cooling out of that 390, which is one problem they did have, is to upgrade to a copper flex hose, you can get it blue anodized to match your block, they look super for a flex hose and reduce engine tempature, you can get the same for heater hoses as well... other than that, beautiful engine, I'll be hoping to post my 302 and 428 when I'm done building those