You need to be using a new timing set, which includes a new chain. Its much better to replace it the first time, then to have to take it back apart in 20k miles. If that chain breaks, you get bent valves.
However, the chrome links are merely a reference point. As long as the crank is at 0', and the cam is lined up to the match marks, it doesn't matter which links on the chain you use. A link is a link is a link.