The waters are pretty muddied for everyone Mike! The Register is here:
http://www.samuri.eu/index_files/Page1566.htm
As covered elsewhere, it is most definitely not definitive and features cars that are not original Samuris while missing others. As Alan has argued on previous threads, the ones with real meaningful significance are the first few on the list with competition history, most especially FFA, Big Sam, and LAL. Most of the others are road going customer cars with variations on a basic spec of upgrades that are, these days, nothing particularly special for a modern period-influenced fast road car - engine head and cam work, triple carbs, exhaust, brake upgrades, etc. The mythical qualities are reflected glory from the genuine race cars and the fact that Spike's operation was the first tuning brand associated with Zs in the UK. In the global scheme, it was local at best - a classic Brit in a shed tinkering and improvising (I've heard stories of him literally porting heads with them still on the engine in the car!). Bluntly, nothing done there was exceptional compared to things done in Japan or the US in period. It just gets amp'ed up to 11 sometimes by the usual media regurgitation and the "ooh, my neighbour/uncle/dad/old boss/insert tenuous acquaintance here had a Samuri!" stories you occasionally hear when someone sees your S30Z. Plenty of the Sams left today are indeed nice cars (I personally love the paint scheme, but I'm a fetishist for 70s stuff as my penchant for flared jeans suggests!), but it gets a bit silly sometimes - usually when some hack dealer advertises one!