nismo_sr20_wut

I am doing some homework on the sc300, were thinking of doing a sourer conversion as a drift project, questions are: 1) any difference in chassis from sourer vs. sc300 2) how much weight difference is there from sourer to sc300 3) how much does the sc300 weigh without driver 4) is there a better year to get for the sc300 ive noticed 92-99 just wondering if some years are worse or better then others. Thank You