airgun

Can anyone tell me how to install 300m tranny gears into my 96 trep?
Is it a tough job or can a knuckle buster like myself get the task completed without to many swear words?
I am wondering if there may be a link to someone elses experience at swapping gears? I'm looking to get a little more torque off the line.
If there is a link on this at dodgeintrepid .net where should I look?