I think I used 3-4" shanks cus I took them from my keezer. No elbow was needed just the regular shank & tailpiece . Got everything from Kegconnection.com
I dont think I ordered the 2" ones cus I really didnt know if they would be long engouh since the tail piece nut takes about 3/4 " of it . I'd go with 3" to be safe.
Primaries: Mojave Red (AG)
Kegs: Hibiscus Saison (AG), Orange Kolsch (AG) , Cocunut Porter
Future Brew: Wee Heavy