This may sound a little dumb,but I'm a little concerned that my car doesn't over heat! Ever! The car is a Moel T street rod 350/350, mild mods on the engine,but I'm using a mid 70's chrysler compact car radiator (Volare I think) and just the stock engine fan. The over-flow tube isn't plugged,(I haven't needed a catch can). the radiator cap is a 14lb-R12. The thermostat is 180 or 190.I can cruise all day and the temp gauge (MOON) never goes over 195 degrees.Several times,in heavy traffic on hot days,it got up to 220 degrees but still didn't loose one drop of fluid! I even made a pass down a local drag strip on a day the temps were in the 90's and still didn't loose a drop! How ever one time I did notice a little seepage from around the filler neck or the expansion tank one time on a really hot day. It evaporated before I could determine where it came from,and never did it again. One other thing that may be related-summer before last I changed the engine goose-neck because it had a pin-hole leak on the bottom of the neck-one year later the new one developed the same leak! Less than a year and it was rotting out on the bottom of the neck part where the top hose clamps on. So...I'm wondering if there is some other damage being done to the engine because of a wrong radiator cap or some thing? It just seems too good to be true,especially when I see other guys having to use front and back electric fans and all that stuff!