Got no power after replacing valve seals on 1992 Toyota Camry

Pulled heads to replace valve stem seals, put motor back together have loss of power

Asked by for the 1992 Toyota Camry
Recheck cam timing.
Thanks for the advice on cam timing.I have already checked, rear head intake camshaft was off by one tooth on cam. All the spark plugs were dark and wet with gas. Set timing on cam and replaced three spark plugs.I will crank it in the morn and hopefully give it a good report
Me too.