I did this on a 103, not a 104..
Use MBZ seals, make the surfaces spotless, put Permatex Right Stuff sparingly and only in the corners and then oiled the bottom of the new seal so it would slide in place. I've thought about running a bead all the way around the bottom of the cover after install but wouldn't have been happy with it.

I've had success with many sealants by letting them dry for a day or two when possible before starting the engine. This allows the sealant to cure before being exposed to oil and thermal cycles.

Miss my 3.2, what an engine. Head gasket went at 360k miles. Compression was still perfect.

Good luck!!!

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