Valve stem seals done for $2500!
How was the car running before you started the whole job? When you the knocked off cylinder #5 lever, how were the other cylinders? Did you work on one bank at a time or did you have both valve covers off at once? It is possible to have 1 bank off 180 degrees (both cams) and the engine will still start (I've seen it several times). Bank #1 has to have cylinder 1 lobes facing each other and bank #2 has to have cylinder #5 lobes facing away from each other.
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