Yup - works fine, I have been running 20mm on the front of my 4.4 for a long while now. Never really felt that there is a material difference in handling. However, on the 4.4 I am running 8.5" wide (#74s) right now and it fits snugly under the fender.

I would agree that with 9.5" wheels and 20mm spacer you are getting to a territory where the wider front wheelarches could be needed.

X5rolls, out of curiosity, where you in MD? I am in Bethesda.

Best
LV