Tranny Trouble

['74super]

i am looking for a transmission but don't really know what to look for. i need something that can bolt in meaning a porsche 5 speed is out of the question. i'm still learning the ropes of all this (16 yrs old). i want something that has both low end capabilites but also doesn't top out at ONLY 100mph. i want to be fast at the light but have a little bit of triple digit play space too. any idea what i'm looking for? and can you guys point me in the right direction. thanks for all the help. -nick