Top rope only. Slab with little pencil-eraser granite nubs to get some friction on. Stay in the blackstreak.
Hardest climb I did before I slowed down for many years.
From Craig Luebben's "A Climbers Guide to Greyrock".
Updated: I miss Craig.
Location
Starts about 10' right of where Fun Flake tops out. Obvious black streak on second tier of south slabs.
Protection
Two bolts at top. To protect with toprope: Climb up Grey Rat Rocksicle (5.8) about 20 feet right of Blackstreak. It slabs to a lower angle on top, traverse left over to bolt anchors on BlackStreak. Set toprope and enjoy!