Check list

Not really. Use studs Don't use studs. Reuse the original bolts but chase it with a die. I'm like wtf. If just figuring out the right bolts is this difficult than maybe I should give up
no need to give up - sometimes "we" make it WAY more difficult sounding than it really is - there is no shortage of opinions here. Truth is, what you are about to do has been done a bazillion times - stick to the basics and you'll be fine. I would simply get a set of new bolts from a local hardware store - problem solved. They are very common - probably automotive grade 3 or 5. Bring the originals with you so you can match up the threads and don't forget to compensate for extra thickness of the new intake (if it is different).