I just ordered a bran new 3.5 long block from Ford for $4,600. Well $5,600 - $1k ill get back when I send my blown core in.
If you want to go that route go to SVTPerformance forums register, and find vendor Auto Nation Ford White Bear Lake (formerly known as Tousley Ford) and go from there.
They sell OEM Ford part for anything for 10% over cost.
EPP led me to Unleashed for tuning since I ordered his turbo sections for my rebuild. Waiting on the turbo upgrades and new tuner device now.