Yes, get it tuned.
Check the Vendor forum here, I use Tuningalliance.com for my cars. He did a street tune after I put the new shortblock in.
It's less then 300.
miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here