[Need help on Trans swap/What i need]

Okay. I was just wondering which route to go since there’s numerous different ways I could go with.  Thanks for the input

[Need help on Trans swap/What i need]

Hey all, I'm new to this forum page and relatively new to the SS life. About a month or so ago when the polar vortex hit Minnesota, my truck started to flair going from 2nd to 3rd so I checked my trans oil level and it was basically gone . My buddy is a GM mechanic so he looked at my trans pan while doing a trans flush and showed me fine shavings of brass (and other shavings). He had his co-worker look at it too and they both told me that my torque converter was going out and quoted me 3-4 months till more things start to happen. So my question is, is it worth it to build my stock 4l60e or do a swap over to a 4l80 or possibly a 6l80?? and if a swap would be worth it, and what would i need?  I looked at possibly swapping to a T56 but it seems like too big of a pain in the ass to do it and maintain it for a DD. I do have a friend that has a T56 out of his 05 GTO.  I am still currently driving it as a DD but just taking it easy.