WCS: I stopped by Inline yesterday, and they have a completely build B18c1 bottom end:

Bored to 83.5mm
Darton sleeves
Darton block guard
JE Pistons...9:1
Crower Rods
Hot tanked
Shot peened crank
Balanced
etc... whole 9 yards

They want $3,000 for it. They say it can handle up to 600whp just fine.

Let me know if your interested. It never been installed.