I figure there's a choice of 2 supercharger conversions, ESS or Dinan. Unfortunately Dinan dont have a UK distributor and the kit is almost double the price even though it uses the same supercharger.
PeteM, Im surprised you've not heard of Linden if you're based in the UK, they were the first to bring over the Holden brand from Australia and are largely responsible for Vauxhall importing the Monaro. They also happen to be UK agents for ESS and certainly seem very knowledgable on the phone and are V8 gurus, however Ive never used them before but they seem to be on the case.
When I say "turn key", all I mean is I give them the keys, they take the car away and return it... job done, all I have to do is phone them up to give them my credit card number, no standing, or waiting around or having to take a couple of days out of work to sort it all out which I dont have time for unfortunately
Ive not gone out specifically to use ESS, so if anyone has any better suggestions for the same kind of money, please tell.