Here is something you may wish to include in your "Bible". The first marketed upgrade by John Hennessey was for the 1992 3000GT VR4 sold as the 450hp VR-200 (no idea what it stands for). It was not sanctioned by MMC for liability reasons and it voided the warranty, but Hennessey backed it with a 3 year warranty. Since then he has become more famous for his Hennessey Vetts and Vipers.
At least 8 were made. I have emailed them to try and get more information and I have ordered a back issue of the magazine.