^^^Sorry, I must have missed this post somehow.
The 2.1L is just a stroker. A stroker and long rod are pretty much inherent opposites. I do however use a longer than stock rod on 3MI Racing 79mm stroke setups (2.1L or EJ25).
I'll be doing a basic 2.35 (99.75mm bore) long rod build for the DD. I'll be pairing it with an Evo 8.5 turbo and cute little FMIC I picked up used on here.