The best suspension upgrade for cornering?

Hey Autox, I'm running the AlterKation on my '70 dart. NOT the '68 Barracuda that I'm rebuilding the front suspension on....I THINK the spring rate that I'm using on the Dart with the Alterkation is the 450# spring rate....

Which one did you buy the shocks for? What is the spring/T-bars in that one?