I vintage raced back in the 90's with 69 TA front springs that had a coil cut out, 1" front swaybar and 81 WS6 rear springs. All with Poly bushings. When I just installed the 461, the front springs flattened out and I replaced with the Eibach pro springs and KYB shiock on the front. Perfect stance, and doesn't drag the headers on many but not all speed bumps.
The ultiamte suspension is relocated upper A-arms, Global west springs and QA1 shocks, major overkill for a street car. Also Subframe connectors are an awesome addtion to stiffen up the car. I just reinstalled mine after 15 years and it really helps stiffen the car.