I got my coil overs, and lower control arms from RCC
http://www.dwayne9.addr.com/, and my upper control arm brackets from bethania garage. Uppers are Heidts, but RCC's are comparible. You really do need all of this to do a creditable job on a Cobra front suspension. Bethania brackets let you do an alignment like normal cars, and keep it where it was set. RCC does have what they call and alignment saver, but it didn't look too sturdy. DV, and Don Scott turned me on to Bethania's bracket set up.
Still looking for Koni coil overs, and someone on this forum gave me part numbers for the Koni's he used.
The Carrerras really aren't bad. Not as adjustable as Koni's but they work OK. 375 lb springs are a little on the stiff side for a mostly aluminum 351W but they're OK.
No deep pockets here, this was out of desparation. Cutting up springs was getting me nowhere. RCC, after speaking with rather long winded Dwayne for about an hour seemed to have the CR Cobra front suspension sorted out. His pieces fit, worked as advertized, prices weren't bad, and are still on the car.