May not be of any help but I wouldn't believe any of the performance figures or top speeds claimed back in the day.
All the nonsense about standard v12 e-types doing 150 mph.
The nose starts to lift at about 135 and steering goes very light. You cant read the speedo at 140 because your eyeballs are bouncing around in your head, plus your bum gets very worm and squishy. Your elbows lock up and your feet get proper sweaty. Probably different symptoms on a race track
You'd be very lucky if a standard 6 pot E-type would do more than 130mph.