as far as what i want to do with, i am not really sure many friends of mine are into autox but i really dont think the zx with the sbc will do to well at that. i will most likely do drag race it. as far as that goes what rear end ratios would i need, i want it to have decent acceleration but i will drive it on the interstate occsionally. so i really dont want a really tall gear. i also plan on investing in a limited slip diff, i am just not sure if i want to spend that much money on the r-180. wouldnt it be wiser to spend that little extra on the r-200. i have a 350 sbc w/ edelbrock performer carb and intake, electronic ignition and a 200r4 transmission. maybe that will help with what gear ratio i will need