Put some miles on the motor; break it in and seat the rings. Mine stopped almost overnight. Watch your breather cans for oil in them. I drove mine around with the valves open to see how much oil was coming out when I stopped. The spots got smaller and smaller then there was none.
My motor (see sig) took about 600 miles.
Dart 348ci, Ed Curtis cam/valvetrain, Precision 76mm, Holley Dominator EFI, CNP ignition, tons of Holler EFI small parts, 4"dp, 4R70W w/T-brake, new suspension coming soon.
Little 750rwhp at 6,000rpms and only 10lbs of boost before we just got tired of playing with clutches. New 4R70W and we are turning it up. Expecting 1,000rwhp.