Other than taking out the spare tire and spare tire kit what else can be done in regards to weight reduction on the 350Z, affordable and simple?

if it matters that much to you then gut the interior complety but just to let you know for every 100pnds of weight reduction you only get 0.010 quicker on your 1/4 mile E.T. so its not really worth it. just get a carbon fiber hood and some lightweight wheels and just get some more power adders. i dont know about you but i like having an interior lol.

Yes I agree.... the most benefit you are going to get from weight reduction is unsprung weight.......lighter wheels ftw.