You might be able to find the bolt specs in the Chry parts book, in the respective group's section. THEN, you can look in the "standard parts" area of the same parts book for more information on what they are.
Several years ago, one of our Mopar club guys discovered that he could replicate the black oxide coating on factory bolts by taking normal silver, hardware store bolts and brushing "gun blue" liquid on them. Turned them black oxide, just shade shinier and slicker. If you didn't know, you might think they were OEM. Obviously works better than satin black paint.
Using OEM bolts from a donor vehicle is a very good plan!