Was the cam degreed when it was installed? The cam timing could be off.
Did you pull the spout connector when you set the timing? You may want to recheck it because it is an easy fix.
Also, try what exgmguy said and readjust the valves.
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1989 lx notch
89,000 miles
bolt-ons,stock heads/cam
60'- 2.07, 8.90@78, 13.93@99
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