IF I had the money I'd would have bought the kit....but with kids in college I went to the local salvage. 1978 Mustang II Cobra was sitting there. Since it was a V8 it had the heavier springs. Lots of folks kick the Stang II but for $75 I got EVERYTHING including the rack and pinion and M?C and booster to use for the cores on new ones. Its been a few years but with my friend, who is a fabricator, I ended up spending 750 bucks for everything. I used the original chassis.
It drives and rides good........It may be a lot different today as Stang II's are disappearing unless you buy that kit from a vendor.
To each his own and depending on material available and skill level. Good luck....and Speedway usually has real competitive prices on this kind of stuff.