[s14unimog]

I'm running an s14 block and thermostat housing with my setup and have the sending unit threaded into the passage from the actual thermostat and the block. I've also drilled mine at an angle so that it doesn't interrupt too much flow. You'll have to take the housing off of course to drill it. If you don't like the plug idea, you could weld it closed... and start over. Look, it may not leak, but its likely too, so if it does, you'll have to redo it anyways, might as well do it over