The rings aren't going to seat in 150miles. If you think the rings are leaking still, run it hard for about another 150 miles, and that should eliminate all doubt about rings not seated.
Other than that, is there any oil on the spark plugs?
Did you have the head rebuilt with fresh guides and valve seals?
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-Harry
AIM: NDcissive
CRX and Pre '92 Civic, Engine Tech and Tuning, & Track and Autocross Forum Mod