If you had a good machine shop, the block should only take a few days. I shipped my block down to L.A. to a well know Subie shop, known for building Subaru/Mitsubishi race motors. Received my block back in 1 week, and this is what they did.
Hone out the cylinders
Polished and balanced the crank & rods
ACL race bearings
CP Pistons
All for $2,000 shipped