ok so i forgot he had a sohc car.but do everything else.dont put a 4.10/4.3 gear in your car.thats just stupid.like he said unless u want to go fast at the track chance is that u are running a 18"/20"o.d tire so a 4.3 is way to low and a 4.1 isnt any better maybe a 3.90 thats as low as i would go.other then that do suspension mods first you'll be happy u did this way when u get any other mods u willl get the full advantage from them .instead of spinning your tires and still going slow.a 3.73 is a good cross between the 2 but a 3.55 is the best for a true street car.