Blazer 4wd speedo cable length

[lks dcvn]

I need to pick up a speedo cable for a 4x4 blazer project (SBC 350/TH50 setup).

I don't have one near me to measure - can somebody who has one handy measure it to tell me what replacement length I need to purchase? Oddly enough - I haven't had to buy one of these yet in all my years around these trucks and did search the forum before posting.

I have seen 100", 83" or 85" as options.

Alternatively, I could just post a WTB ad in the blazer section, but want to know the right length to get.

Thanks!