I've been looking all over for a header for my 280zxt. It's a p90a/f54 combo and there's nothing on MSA about it. Also, I called MSA and the associate I spoke with said that it would be a custom job and that he couldn't recommend anyone to make me one.

Anybody have a header on their turbo z?

Also, since I'm swapping this motor into a '74, I'm taking off all of the smog, and since there's not going to be a catalytic converter how would I get some performance from that aspect? I have no use for a cat-back because I don't have a cat, right?

try http://forums.hybridz.org

You will make plenty of power with the stock manifold. Spend your money on other stuff, like an intercooler and a good turbo. The stock manifold can be port matched witch will help some.

HMMM a turbo motor in a 260, sounds like a cool idea! ; )