Well, you learn something new every day... I'd only ever seen the 'pipe' style nuts, not these mushrooms.
The pipe-style starting nuts can be torqued with a 1-5/16" deep socket... PROTO Tools makes the proper item:
PROTO 1-5⁄16" size … 29 / 32" deep … 3/4" drive … Proto #5542
It can be found from many suppliers… here’s one:
https://www.amazon.com/Stanley-Proto-J5542-4-Inch-16-Inch/dp/B00018AJSY
I'm almost certain nobody else makes a socket with the sufficient depth... I did a *lot* of research to find this Proto item, and I've actually used it for the job, so it's a sure thing.
However, these mushroom nuts would probably require a crows-foot attachment for proper torquing (with requisite recalculation of the torque), and I'd imagine the size is the same (1-5/16") though that bears checking. IMHO, I would not use a pipe wrench, though, since the Alpine crank pullies are already subject to failure via cracking... no sense risking over-torquing.
As for SV cars, IIRC they came with a plain nut... i.e. no starting nut... and it is also 1-5/16".
Now, back to the advertised item... we've agreed the nut is a correct item, but surely that 'starting handle' is not the correct item?? It looks more like the handle from a Shelly jack (at best) or perhaps a brand-x scissors jack.... but, certainly not a Sunbeam item, is it? Heck, it's the wrong colour for a start.
Click here for Grainger link to Crow's Foot.