Congrats.
Good luck with building a kit with a partner. I have successfully done it twice with my brother, first DRB Cobra, then Harrison Cobra. And we still talk to each other.
On the downside you will have to make lots of compromises and when things are not going well, you won't have much to say to each other. But on the flip side, with 2 heads thinking about the build, you end with some really good ideas and a far better build at the end of it. Plus you can leverage of each persons talents.
And if you are like me, it's much more fun to work on a car with someone, than by yourself.
I have only 5 words of wisdom when it comes to building Cobras - "Ask Club Members" & "Swap Meets".