Hi. I have only owned my 75 280Z for about 2 months, it is a daily driver and needs several repairs, and I have very little $$ (as most people). Anyway, I need my exh manifold repaired (it is leaking all over) and I need advice on repairing it or getting headers. I could install headers from british victoria (monza headers) for no more $ than having the old maifold machined. Are these safe to install on my car, and do you think they will add much in the way of perf?? Are there other headers that might be better? Also, my Z is a CA model with cat converter. Thanks!!