I'll try to set up to that height. The stanchions/crowns have a LOT of room to move.While you're changing the front end height. switch that top crown for a properly flat one and raise the stanchions through both crowns.
Those old 888s had stupidly long stanchions and from your pic yours are dropped right through the crowns and have raised the front end so far it looks to have pretty much ruined the nice handling low BB traits the Sunday was famed for.
for ref: Most of us were running 13.4-13.9" BB heights on our Sundays