This project throw up the problem of sourcing good quality exhaust manifolds and systems at reasonable cost which pretty much eliminates those to be via the USA and Japan for opposite reasons ; the USA parts are cheap and cheerful and the Japanese parts are excellent but sooo expensive: both end up costing a lot to land here with shipping and customs added!
Dave, a well-known 240Z racer and preparer of competitive cars since the early/mid ‘80s, and I talked about setting up a company to produce them and DJS30 was incorporated (Dézart-Jarman) and S30, well, you can work that bit out yourself – we were company directors!