Going to refresh this thread as I've yet to get the trans re-build done. Any transmission guys on here to help guide me with good performance parts list to arm me for conversations with trans shops? TC, clutch packs, spring kits or full rebuild kit you'd recommend? I may buy a performance parts kits to provide to the shop or any info to help influence the shop toward a quality re-build kit would be appreciated. Again its a 6L80 behind a supercharged 5.3.