I don’t doubt Al’s top end, really. I was just pushing his leg. 🤣
The real problem of driving a Beetle that fast is not that they become front end light. They’re still usually kind-a sorta stable(-ish) around 100mph ( I type from experience, here).
The real problem is the severe brake fade from those under-sized drum brakes. Jump on the brakes at 100 and it will take you way over a quarter mile to stop and at the end it’ll seem like you have almost no brakes at all. (Again, experience was my teacher).