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Off the top of my head I think it will work, but I haven't tested it. The Mk7 version definitely has enough travel that the two drive gears will touch, I'm pretty sure the Mk8 version should too.

The main thing to check is that if you put your two drive gears together side by side, you can actually pinch the filament between them. If the hobbing on the drive gear is too deep then the filament may slip through without being gripped. And it will depend very much on where you get your drive gears from, with so many clones and copies I have never seen two the same from different vendors. I just tested with my Mk8 drive gears and it looks very marginal, but then I'm pretty sure these were sold as '3mm filament' drive gears so the hobbing may be different to yours.

I also don't have much experience with 1.75mm filament in geared extruders, I'm not sure if the gear ratio will be too high. I guess you'll just have to try it and see!