a 'boat anchor' (253) in a stock VB is slower than the 202.
Naturally aspirated, (assuming it hasn't had the $H!t stroked out of it,) it would be impossible to acheive those sort of figures without changing every component of the engine; ditch the POS carby for a $$$ fuel injection system, Custom made head with 4 or 5 valves per cylinder, Quad cams, and $$$$ of development.
the fastest street REGISTERED (not street legal,) are running high 8's or low nines at best, (Keir Wilsons GTR, Munros GTR etc,)
The fastest street registered V8s are doing poorly in comparison, let alone street legal cars. Most simply can't get the traction to get such a time