okay, which one would be the best choice. 240sx(60mm), 300zx(55mm), or TWM(?mm) on my 280z. I got 6 in 1 header. also 480 lift, 274 degree duration cam( I have't install it yet) I'm thinking about getting turbo AFM too.
I used the TWM unit on my L28 with the same cam and headers and a Maxima N47 head. I recommend that you stick with the stock AFM, and get a A/F mixture meter. Then live with it for a while so you can get used to what the mixture is doing. I think changing the AFM at the same time introduces too many variables at once. BTW, my ZX distributor and MSD-6A really made the most difference.
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