New Project

ok HS members...i need all of your help...a couple of friends of mine, as well as myself, are getting ready to start on my friends 1991 GS...my question is, can someone give me the specs to this car??? and what kind of mods would you suggest??? because swapping is not an option...we're planning on rebuilding the bottom end and the head soon, but dont know exactly what kind of parts to get...like cams, rods, pistons, etc...we're making this an all out street legal race car, w/ a sleeper mentality of course... any ideas, comments or replies??? thanks