After I sent him an email, he has responded and accepted my challenge!
Fair play

he is actually a really cool guy on the phone, and is right up for it.
He has pulled the car off Ebay and we are going to try to do it next week at Brunters using Rentons Datron equipment.
The bet is very simple. I KNOW its NEVER EVER going to do 180mph and I was SOOOOOOO sure of this I have wagered £1,000 that he can't even do 150mph at Brunters. He has accepted this...
I am now wishing I'd have said 160mph but never mind

Got to give the guy a chance to take my money
Watch this space, as I could be made to look VERY silly!!!! Fair play if the old girl does it though, but a GENUINE 150mph at Brunters is fast... I mean 300bhp+ cars like Tiffs and Pops could only just do it so how is a big fat old granny?
Renton is right up for this and thinks it could become a regular feature! 'Put your money where your mouth is' or something similar... 'a put up or shut up' thing for all those blokes down the pub with 500bhp Cossies on 4 greens and a T3, 200mph normally aspirated Supras and 8 second 1/4 mile 2.0 16v Novas
P.S I may need some egg remover for my face later in the week, does swarfega work ok?