I just finished my restoration. All original car, rebuilt the 400w ith .30 overbore, new everything and new be cool aluminum radiator which is way over kill for this car (should be anyway). I took her out on her maiden voyage tonight, after a five mile trip, I returned home, the gauge was showing 225 degress and she started to spew coolant from the overflow line. Funny thing is, it didn't overheat before the rebuild and I upgraded the old cruddy three core tank? Does anyone know what it couild be?

Just in case anyone was wondering, yes, I enjoyed the hell out of my 5 mile trip, it's been a long time coming, now to fix this overheating problem.