You've hidden a lot in the phrase "plug in some data from that end". Plug into what? With what goal?
In the 1680s you're talking about what, 10 generations back? Y-DNA won't be a miracle bullet that finds you someone in Britain or maybe another American that shows you the Clark who is 11 generations back. Heck, even if you are lucky enough to find matches who have the name "Clark" today, you almost certainly won't be able to pinpoint a person 15 generations back who is a common ancestor and say, well, I don't know exactly how you get back the additional 5 generations, but both of our immigrant ancestors were g-g-grandchildren of that same guy.
These sorts of identifications very rarely happen. If you have a particular pair of people you want to test to decide if they are closely related or not, then Y-DNA testing can be much more useful. Perhaps that is what you have in mind with the Hurst connection? I can't tell from your post. If you believe you have common paternal ancestors with some living Hursts, then by all means get two Y-DNA tests from FTDNA and compare. I'd start with the cheapest ones.
Otherwise, what is your goal for this y-DNA testing?
Ellen is right that FTDNA is the only site with a significant pool of matches, where you can try to compare and find someone who probably has a common ancestor in the last 5, 10, or maybe 20 generations. It also has surname projects, often run by real experts who are trying to group large numbers of people into clusters with very distant common ancestors. But it is exceedingly rare to find a match out of the blue and say, "hey, we just broke through our common brick walls!" I can't tell exactly from your post, but it sounds like maybe that is your hope.
If that is not your hope, then there are other options to test your Y-chromosome than FTDNA. But right now there is emerging somewhat-affordable whole genome sequencing that will cover your Y-chromosome and all of your other chromosomes in much more detail than the big DNA testing companies do right now. There are a lot of things you can do right now with data like that, and certainly in 5 or ten years there will be tons more that can be done.