going dog should be easy on a alfa box as they are one of the very few boxes that the dogs come off the gears. but there is the slop in a dog box it would be a pain on the street. when going a constant speed it would go bang bang every time the motor goes from pushing to pulling as the slack is taking up.
They work great on the racy way as you seem to be WOT or all the way off the gas.
I think why most race boxes use straight cut is that they are super easy to make. cutting a good helical is very hard and takes a lot of time. it is also a lot harder to design. almost any cad program can do straight cut design. and the gears can be cut on a cheap 3 axis mill. so if the gear can cost 10x less and can be cut way faster what is a little noise on a race car.
If you went helical there is more risk that there is a error in the design. you have to wait a real long time for them as they take a long time to cut and they cost a whole lot more. and what is gained on a race car, quiet? the strength is more or less a wash if using a stock box that the housing flex might be the limiter.
1987 black Milano Verde, 1987 (made in 1986)blue $200 gold with ABS and LSD
1972 White spider 2000 Veloce