torque converter info

Hey mopar brothers. Since im a newby in the mopar world im going to be asking a lot of questions, and this is one of my big ones. Got a 71 Duster with a 318 and a 727 tranny. The guy I bought the car from said the tranny had a 360 torque converter and either it is supposed to be balanced or not..... I dont know. SO, I ordered a TCI sizzler converter for a Mopar 727 tranny but doesnt say in Jegs a certain engine size. Will it work? And i cant understand how you can balance anything that is slinging fluid anyway lol, but thats why I like you guys. Cause yall know. Thanks