The ARP studs are made of steel with 190,000 psi tensile strength. The 7/16 shank will then be about 28,000 psi tensile strength. The threads would be about 10,000 psi tensile.
First of all we were taught NEVER to jerk or hammer on a wrench to tighten a nut. Never make a series of quick cranks on a socket wrench handle while tightening. This will snap the fastener. An impact wrench does exactly that. An impact wrench is really for loosening a bolt. Some of us DO NOT have an impact wrench with an adjustable torque setting. All we know is the box in comes in says the max torque is 250 ft lbs or 1000 ft lbs!!!! If you are using an impact to tighten a nut, or in this case, installing a stud, you are rubbing too many brain cells together. Some folks who are busting their studs are riding the impact trigger until she goes flush...and beyond.
A person may not have the correct size serration diameter for an already used hole.
As I said, pressing in is a good way. Not always possible. Not always wanting to pay a shop. If it breaks try another one. The luxury here is the drum comes off for good bench access. Hammer them in if you want. Click
Many actual mechanics use the draw in method on the rear and FWD.