Wouldnt dry fit the front main. Just press it into the lower timing cover and reinstall cover when ready. Clean what you can see of the upper oil pan gasket carefully and reuse it. Recommend Wurth gasket maker (black rtv). Don't apply to the whole lower timing cover sealing surfaces. Just the bottom and the corners of the tops (where it meets the heads & block & upper cover corners).

Disclaimer: just an opinion on how to do some stuff

P.S. Check the threads on your crank hub. They will strip out with multiple uses.

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Previously owned: '03 4.6iS Dinan Supercharged