The Tony Pond lap was (I believe) in a rally car, without the extra weight of a navigator (Tony was an Island resident at that time)
I've been round with David Mylchreest, a most entertaining lap. You turn on the course at St Nininian's and - whack - you hit the bottom of Bray in a few seconds! It was only the seat belt that stopped me joining the radiator motif when he braked for Sulby Bridge.
I hope you can access John Shand's first-hand account of a lap that was on the site a few years ago.