I don't romp my classics too much except to blow them out like you. If I were still in central Illinois where there is 1/100 the traffic I drive in everyday (metro Atlanta), it might be another story altogether. It's where I found out how light the front end of my Cougar gets above a certain triple digit speed.
I can describe some irritated people behind me. It was at the drive through of the local sonic when I realized that I just needed to bite the bullet and finally replace the valve seals in my '65 Galaxie. I felt bad enough for the guy behind me that I shut it down until the line moved. Next weekend? Valve seals.