Not sure their are any torque specs for any of our old cars (other than tighten by hand/wrench until tight)
If you can't find anything specific here is a torque chart that I use...For our old soft 7/16" studs I would recommend using the "grade #2 column" which is 30 to 35 lbs max.
Where Are You From? Leavenworth, WA / Yuma, AZ
Do You own a car built by Durant? 2 Durants / 2 Flints