past vs past perfect

[Daemon99]

1) For over 10 years, from the summer of 1980 to the winter of 1990, he spent his time looking for her.
2) For over 10 years, from the summer of 1980 to the winter of 1990, he had spent his time looking for her.

Can someone please tell me which of the above sentences is grammatically correct?
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Sajan]

The first one would be correct because it refers to a finished period of time in the past.

[Kitosdad]

And No 2 doesn't mean the same thing.?
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Keep it simple ... Keep it interesting.

[Sajan]

As far as I know #2 should be followed by smth that happened after that.