[dodge trucker]

I put this in "general" because this engine isn't off of, and isn't destined for a Cub machine. I originally started this post at the end of the other recent M18 thread under "Kohler engines" but I didn't want to muddy the waters of that thread.
I just picked up a M18 via CL, at what I thought was "a too cheap to pass up" price" probably cost me about 2/3 in gas, what the guy wanted for this engine. He took it from a WH tractor when it started eating oil. Original owner of said WH machine. He repowered his tractor, with a brand of engine that I don't care for. He sold me this one for a whole $25.
Said it was still running when removed, plan to try to fire it up and evaluate things before I tear it down. I want it as a backup engine for my snowblower tractor. but its KT19 is still holding its own, so I don't have to be in a hurry.

Anyways I looked around on Feebay and didn't see a "kit" shown, like they sell for the cast iron singles. Am I going to have to buy pistons and gaskets piecemeal-style for this series of engine?
I am going into this teardown expecting to have to take the jugs in to be bored, whole works. For purposes of this topic I am mostly interested in "parts" prices.

As far as Kohler suffixes go, this is a M18 QS. I know that Q means "quiet model" but does that mostly pertain to the exhaust? In the singles, I thought the engines with a Q also had the grenade gears, or no?
did any of the opposed twins have these?