Any proposed ratios for 1-5 Road/Track?
A final of 4.444 fits more with a dedicated track car. I think a street/race set up could benefit with finals of 3.9 giving a better commute to the track and keep those pesky Auto-crossers happy at the same time.
Interesting point you made that helical are stronger than square cut. Has anyone considered a herringbone or double helical gear to remove the axial load?