Jovani, we do not disagree with your ideas at all. We just enjoy playing around with the creative process thinking of various options. You will notice this is true with every idea that passes through the forum. So please don't take our discussions as challenging your design process, we like what you have done and find nothing wrong with it.
The point you make about allowing for off-axis movement is a critical one.
Different front strut designs deal with this in various ways. Fiat's design was to place the pivot (steering washer) toward the center line (vertical axis of rotation) and the rubber "cone shape" of the top mount allows this to swing from inside to outside (horizontal axis of movement) as the suspension travels. The idea being the rubber was compliant enough to allow for that off-axis movement. That is why the stock top mounts become deflected off center over time; the load of the off-axis movement pushes the center rod to one side at an angle. And unfortunately the rubber portion of the Fiat mount becomes hard and non-compliant with age. So the stock design really only works best when everything is fresh and new. I think this is the main reason the stock replacement aftermarket top mounts fail so quickly, the rubber compound is not up to the task of the side loading.
Given the importance of this off-axis movement, when adapting the Ford mounts the center "filler" piece (that goes into the lower cup on the mount) should be contoured to fit the void correctly (as Jovani did). It is the area where this movement takes place in this set-up. So making the aluminum filler piece to properly fit the shape allows the off-axis load to be evenly transferred to the rubber cushion. Not having a correctly fitting filler piece will focus all of the load into a couple of small points and dig into the rubber, decreasing its life significantly. So really to make this conversion work best (notice I said "work best", not just to "work") the filler piece should be custom made on a lathe as Jovani has done. It could be made from aluminum (as done above), delrin, nylon, or similar material. Over the years we have found that many (most?) of the members on this forum either have such part-making capabilities or know where to get it done, and are willing to do so in order to have the best possible outcome for their projects. If someone is considering a custom top mount conversion (being a critical component on the vehicle), they should expect at least some degree of custom work to be included. The "stack of washers" idea is far from ideal (honestly I've never like using a stack of washers for any type of sleeve/spacer application). While it can be done the "easy" way, that might not be the wisest choice considering the safety aspects with a major suspension component. And I only say this out of concern for the well being of our members, certainly NOT in opposition to what has been said previously in this thread.
Jovani, perhaps view this as an marketing opportunity, to make the parts necessary to properly do this conversion for those that do not want to make (or have made) the pieces themselves. And once again, thank you for coming up with this excellent concept. We really appreciate everything you have offered.
I will also note that IF someone WISHES to utilize the Ford thrust bearing, or any such variation of it (as described earlier), the same off-axis movement can be accomodated in the same way. By allowing enough space between the custom made components and the top mount, and having a proper fitting "filler" piece in the upper cup, the off-axis loads will be transferred to the rubber portion of the mount and handled just as it will with the narrow bearing design. But yes, this will increase the height of the front suspension by a few millimeters.
