That's an interesting approach. When I ran my '71 Capri Mini-stock, I left the strut towers intact (as per track rules) but braced them with tubing attached to the frame rails and front hoop, which allowed me to remove the extra sheet metal as you did. A bit cruder than yours, but still quite effective (as several track records will show.)

Looks like you have a lot more adjustablity than I did, but again, I was limited by the rules.