904 torque converter recommendations

You guys might be able to help me verify and fix something else. My car originally had a 318, previous owner swapped in a 360. Being the 360 is externally balanced with dampener and 318 is internal balanced. How can I tell if someone installed the correct 360 balanced dampener ? Or the incorrect dampener from the 318 that is not balanced was put on my 360 ?
I assume the balanced 360 dampener can be verified by the round machined divits on the perimeter of the dampener ? Being a 318 is not externally balanced, a 318 balancer wouldn’t have these machined circles on the perimeter of dampener ?

The 360 balancer will have either a scallop out of the balancer, or an extra weight on the front right behind the pulley. In other words, it won't be symmetrical all the way around.