I couldn't be happier with my Goodyear G7 Blue Streaks. It's the same compound as the BB but just a chicken-scratch tread, no open grooves, so stickier. It's the tire most of the vintage racers use. Not for wet weather.
During 3 days at Hallett, I ran out of guts before I ran out of grip. At the limit, they just slowly kinda squirm sideways. Lots of notice.
Photos at:
Goodyear G7's