More usable cage designs

Lux. Not sure what is meant.

Here is my thought: Depnding on the door bar design I would absolutely consider redoing the door bars as those are pretty straight forward. We changed the door bars on my Datsun for a tarmac rally, one of the things we added were sill bars. You could add a sill bar (low door bar running along the lower edge of door upper edge of sill), then add another door bar that starts hip high at the rear hop then down just below seat and continuing on the same diagonal plane to the front hoop. Weld in a sheet with flared holes between the two bars and possible some small diagonals where the door bars meet the hoop.

As for the interior you could add some aluminum door panels and if you use some thinner gauge aluminum you could make a tunnel cover / center console. Further cut some rubber trunk mat type material to fit the driver and passenger floor boards or use aluminum. Basically do vintage rally car style of interior.

If possible you could add a fuel gauge to the cell (assuming it has a fuel cell

This would likely give the car the hot road track day street car feel and whoever bought it could still run a vintage race if they wished.

Barring all that I'd either live with it as is or do as Codrus said and cut the front half of the cage out, even though I'm not big on removing cages (always paranoid I'd want to put it back in).

My .02 take it, leave it, throw it in the bin.

With my ITB Alfetta I am pondering the same issue. When built, the encroachment of bars into the door were not legal, so I have a sill bar and a diagonal running from shoulder height to just above the sill bar at the front. I recall when we were at Bonneville there was a car with hinged NASCAR style bars and some sort of positive fastening system at the rear which opened like the door (the door skin may have actually attached to the bars). In trying to keep my car SCCA legal I went to the rulebook for ideas on removeable bar design. (See page 92 designs) There is an Alfa spider I saw that had a bar like Tom1200 describes, maybe on Petrolicious. No need to remove, but may not pass muster for vintage racing. I agree with Tom1200 as well regarding interior aluminum panels; the street rodders are really innovative in design attractiveness. Make cool bead-rolled and dimple-die flared panels with aircraft style riveted fastening. The new Ontario laws notwithstanding, your Alfa never had interior quilting with safety in mind, so anything you do to provide protection (race quality foam covering the bars where ankles, knees, shoulders and head can reach) would be a plus for street or track use. I agree, leave the cage, let the next owner have that option, but IMO, a removeable bar with functioning side windows makes a more widely useable car. Provide the next owner with two sets of doors with quickly removed hinge pins. For example, Chris Albin's ITB Golf did that as well as changed the grille and tires to convert from ITB specs to FProd specs in between sessions.

Cheers!