Thanks guys for all the info. I think I'm going to going to do.

Sorry if my q. Was a little confusing, I first thought it would be a hackintosh but found out was a hackintosh was(basically a windows PC w/ Mac is) but that's not want I'm trying to do.

Sub. And chs is correct. I'm trying to build a legit build a Mac w/ previously owned working Mac parts separately.

Ill do post a DIY thread once I get all the parts.

Also would I have driver/ firmware problem doing my method?

Everything would be mac parts except the ram which is the same spec as listed in the apple store and the ssd HD is a "crucial" brand.