hey guys my car was originally a 4cyl auto notchback 1991.im wantin to change the gears in my rear because i want more ass off the light...but im wondering what gears came stock in this rear it winds out in first VERY quick i mean i can take off in second and if im on flat ground i can go take off in third sometimes.but will the the 4cyul rear stand up to some beatin?im torn between 3.73 and 4.10. i drive the car daily and gas mileage REAKS as it stands.but, if u guys were in my position would u just gear the 7.5 or spend the money for a 8.8 thats already setup?and at times i belive this rear has a spool in it cause if u hit it rite at times itll dance all the way around and walk it sideways.but to help the questrion of how well will the 4cyl rear stand up with gears the first question im thinkin ill get is what kinda upgrades do u have, well its got a edelbrock 600 a summit aluminum high rise intake manifold ford racing 1.6 roller rockers, hooker big tube long tube headers, msd cap rotor button and 8.5 wires and a msd 6al ignition box a holley red series fuel pump hurst shifter tremec tranny and stage 4 clutch and a set of cast 40 heads with 2.02/1.60 valves, no cats true duals and flo pro mufflers...WHAT WOULD U DO?