The removable tunnel should make access much easier. It will have a good level of sound deadening and carpet, but I will make it removable (probably with press studs) so that it can be accessed for servicing.
I am definitely not the first to change to a steering rack, and even though I have changed it, the suspension geometry is all the same just the method is different. Either way, the car will also have 3 times the factory power, so it will generally feel quite a bit different to the originalYou sir, are a mad scientist, but I say that as a compliment. With the steering rack & column from Toyota, there’s very little Alfa 105 left, other than sheet metal. Steering defines the car for some people. So maybe change the name to toyalfaferrari or alferraritoy.
Colin Byrne converted his Targa car to a rack several years ago. Some people are annoyed that I am not using all Alfa or Ferrari parts, but they fail to see that with this sort of build you need availability. Toyota parts meant that I could mix and match from several different cars to get the parts I needed to fit my car.BTW there is an Adelaide 2600 Sprint with a rack and pinion steering set up that I saw on this site a couple of years ago. That car was built for Targa Tasmania rally.