Hi Kerry, A few years ago, there was a series of articles titled Urquharts of Gairloch in the Clan Urquhart Association Newsletter, including several family trees and some limited biographical information, most of it dealing with the time period you are looking for.
However, the only Kenneth Urquhart listed was born in 1856 to Roderick Urquhart (bap. 31 May 1815, d. 5 Jul 1877) and his first wife, Ann MacKenzie (c. 1822-3 d. Dec 1862), whom he married in 1842.
There were quite a few other names listed.If you happen to have any other names/dates associated with Gariloch, maybe a cousin, brother, uncle, etc of one of your Kenneths, I'd be happy to reference them against the newsletter articles I have.Just post them here or e-mail me, and I'll get back to you as soon as I can.
Kind regards, Bill Urquhart email@example.com firstname.lastname@example.org