I'm finally ordering my suspension for my 70 K5 and I 've settled on a 6 in. Suspension System. National Tire and Wheel has a sale on the Superlift Suspension System for 599.00(including 4 springs, 4 shocks, steering arm, new brake lines,hardware. Thats 150.00 bucks cheaper than the Skyjacker suspension system, which includes the same things. Is the Skyjacker really worth the extra 150.oo bucks?? Anybody have an experiences with these two kits??