68 hemi dart build

With no welding skills, I'd buy a K-member unless you know someone that knows how to lighten them. It's not tough, but you need to insure it doesn't warp while welding inorder to insure the holes line-up to the frame rails.
You'll get plenty of opinions as to how the frame & rollar/cage should be tied together. All I'll say about that, is that if you look at "My Nightmare" in the "Member's Restorations" section, you'll see how mine & "Injunkie"'s cars were done. The 9in shouldn't be a problem, however I'd go with at least 31-spline, preferably more, but once you hit 40-spline things get kinda specialized.
Many HemiDart parts can be home-made or adapted from existing stuff as these cars were cobbled together ASAP from Mopar. I'd suggest getting the authentication guide to help you along......