What do we do about the speedo cable being too short to reach to the input port on the 700R4?

I have a '66 I6-250, I just installed a 700R4 in it. Cable is too short. Will an extension like the one listed below at Summit work in the old girl?

https://www.summitracing.com/parts/dak-130011


"The greatest use of life is to spend it on something that will outlast it" ~ William James

'25 Chevy Superior
'66 Chevy C10
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