i have a 96 plymouth neon sport thats an automatic. i can get a parts car that 5spd. can i convert my automatic to the 5spd, do i have to change the computer or anything else?

I believe you will have to change out the ECU, I'd go for a Mopar Performance ECU from JR-Motorsport. Also, do you know the specifics of this parts car? You'll want to make sure it has the 3.94 tranny...