Oh, I've thought hard on a Barra Van.
Easy as to cage the car and keep it hidden. plenty of XF's have been done, so not too hard to do.
Easy to drive on the street and a mid 9 would be a walk in the park.
BUT, then, the attitude of, I've it'll go 9:50, why not a 8:99 and it is doable.
BUT, then, if an 8:99 is good, then an 8:60 or so, would be better.
Can you see where this is going.
Even the poor little Datto, was only built to run 11:50's when I started.
That became 10:60 @ 130 mph.
When I sold it, I had a heap of gear and a third N2O ready to go on, as I wanted a 9:90 out of it.