1965 Offenhauser 273!
Jim from Racer Brown had a member on here looking for an original D Dart cam shaft to put on their machine for specs. It was my belief the original D Dart camshaft came from Camcraft but the valve train springs may have come from Racer Brown. This may be apples and oranges info due to the Offy aspect. I will be tuned in to see what you find out. This is cool stuff thanks.