i have a ls tranny on my 91 hatch and i have a really bad tranny grind and want to change my gears since the ls gears are so long and i want to put some si gears in it now i have a friend with a sohc si cable tranny and i was wondering if that tranny will bolt up to my car if now how hard would it be to change just the gears will the fit in my ls tranny and will i need to purchase anything else to swap the gears thanks alot everyone lmk asap