steve c wrote:use high tensile threaded bar or bolts
A good idea, although I don't believe the original studs were high tensile steel - my experience is that they are fairly soft.
The original studs were inserted from the front, and the rear was peened over to lock them in position. The studs had a short parallel section between the two M8 threads on each end - this parallel section was 8mm diameter, meaning that it can't pass through the M8 thread in the hub. If the stud can be screwed all the way through the hub, it's not original, and probably just a piece of threaded rod.