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.
178,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here