Superchipping your Volvo

Hi, I am thinking about Superchipping my 1989 Volvo 740 Turbo, just had a chat with the bloke in Aussie who does that and he has chips for my car. Cost is $800 for about 1-2 days without my car. There is an immediate increase of 35HP in the performance of my car and this is noticeable also at the top end.
You can view Superchips at Superchips.co.uk and apparently select Volvo from the menu on the right for specification details - and doubtless there will be an agent nearby, wherever you live, for this "improvement". A bit like hot rodding a standard car, without the expenses involved, if $800 is not out of pocket too much.
BigBenn