I think a good one would be simply a section with a history and models of the MR2 etc
An area for modding stages for both the turbo and N/A models showing expected power levels etc would be good to give people a direction to aim at. Maybe a how to on early mods like filters and fuel pumps etc
Also a FAQ area for people to find the most common questions like whats the difference between Rev1 2 & 3!!
Just my 2 cents