"...... you missed a good story on another forum. There was a huge debate about whether or not I could run it on it's side....."

That should have been interesting. I had some scoffers PI (Pre Internet) when I did the same thing with a brass/copper radiator cross flow I built for a 58 Chevy sedan. They use a tall narrow radiator and finding one to fit that that was useable was not working out. Worked great for 15 years and 75,000 miles.