I had sure thot Gilera was from Italy..
Re the drag bike frames, typically a lot were midded stock frames..
BUT.. in the early days, the custom ones usualy had almost zero rear stretch and were long on the front, the tire shows the early era. When they started using bigger rubber, things started changing.
Usually back then onbike with big power, the smoked the tire a good portion of the 1/4 mike.. Avons, and M&H...mostly..