[CWizard]

Pman, this may not help you at all, but a 12 point 12mm socket fits the driveshaft bolts on my SPF. These bolts are Ford part # N800594-S100, and I think they're standard for SPFs. They are metric grade 12.9, very strong and very hard. Unless you can verify that your Allen head bolts have equivalent specs, you might consider replacing them with the Ford bolts.