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Propagation Delay on Existing Layout

ameehan2

I'm editing an existing layout and the SI engineer has defined the targets for DDRs as the _T and _C pairs in each group. The previous designer made the pairs as short as possible and then added length to the rest of the sigs in the group. In this case, the other lines in each are way too long and I can't make them shorter. On the previous design, the pairs were never lengthened, so my question is: Will it be OK for me to just lengthen the pairs so the rest will be more easily matched? The SI guy is in another time zone and I didn't really want to wait a day for his response. Hoping to get a sanity check from the Community. Thank you.

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