When you say block off plate, are you talking direct from the block (like SR20 guys run), or something that still attaches to our factory oil tree? I couldn't source a direct block off plate (eliminating the tree), and I don't have my heart set on the Greddy adaptor, just seems to be the only company making one for our Z's now.
93 2+2 Twin Turbo Track Build - jsworks.org for more info!