Martin
The Dax for sale at Goodwood on Friday is, according to the catalogue, based on a GTD chassis. It has a 350bhp 302 and at £20 - 22K estimate could be rebodied and still be well within the £35k budget you mention.
Apparantly it was previously owned by European Aviation/Paul Stoddart of Minardi fame and has covered about 1000 miles since it was built in 1994.
The auction is in the evening and athough I will be at Goodwood in the afternoon, I can't hang around for the auction itself.
If you can get there, you are welcome to my catalogue if we can arrange to meet and swap etc.
My mobile is 07720 414319