I have actually done it myself.
The archs shape is perfect to last in stormy weather. As the material. Unlike simmulair tales were they have totally square archs.
Actually there is a way of cheating. It is actually easy to have 2 of every kind. Because you only need to have basic spieces. For exampel only 2 kinds of very mixed humans and in a few generations you will get several Under species for humans. There are only abit more than 100 basic spieces. There are millions of ants species. But you only need 2.
So the debatte about however it was possibel to have that many creature will not lead us anywere. The evolutionist are closed for the possibilitie and the creationist are not open etheir ( allthough i believe in this. There is alot of things that the book doesent tell us about this. So they should research new stuff using this as a base)
So what we can do is to have a miniature arch replica build with the same shapes and so on. and of the same material. Then we should have it in a little water lab to see exactly how much storms it can take before tilting. Of course as with every minyature modell the small modell will in procent be stronger than the original arch.)
And then after this we would be able to decide if this is plausibel or not. If it is plausible and that this kind of boat could withstand heavy super storms then more research should be done to check the sea shells on the mountain and in the desert and try to be 100 percent objective.
Of course more models of the arch should be tested from otehr simmulair tales. There is alot of tales about the flodd actually but i believe all come from the original event. AKA the flood.