Not sure on New K engines, but the older singles worked well with the Power King Economy bellhousings and clutches out to a small 3spd trans in many things. Don't know what kind of room this thing has. What is a Suzuki Jimne exactly? A 4 wheeler or one of those small flat-bed trucks? Seems there is quite a few places pulling that type vehicle into the States now, most not roadworthy they say, maybe a google search will find sources for parts for them?
The Suzuki Jimny LJ20 was only allowed to be imported into the states for a few years in teh early 70's. They loook like a very small 4x4 jeep.
I have scoured the net trying to find parts and/or conversions to change out some things but so far no luck at all.
You mention a power King setup, can the clutch from one of those still be bought?
I was talking this over with my brother last night and we were wondering if we could take the flywheel off the original motor in the Jimny, adapt it to bolt up to the Kohler, then build a mid plate and front plate on the front and back of the Kohler to hold it in the correct position so that the original clutch could be used????