The kits that give you 6 per side are only for the top. They are usually the correct 5/16 bolts with the star type washers. There are 3 additional bolts that you can get from your local hardware store.
I'm curious. You found 11. Where are the other 2 that I missed ?
A 1/2" bolt would be ENORMOUS. They are not 1/2", they are 5/16"-18. This bolt size probably accounts for 70% of all the bolts on these cars, including the motor. When people say a bolt size, they are not talking about the socket size, they are referring to the thread diameter and pitch.
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