1-800 Call Tom. Chicane 67 on this board can hook you up (pun intended) with a proper set of springs for your ride, it'll depend alot upon what you want to do with the car. I run the full Hotchkis setup on my 69, and am pretty happy with it so far. I drive it on the street alot, it does not beat me up, and it handles very, very well. Not a bad setup for ordering out of a catalog, but if you want something more elegant, go with Tom's suggestions. He is wise beyond his years with these cars.
That said, I am a bit surprised that Global West's springs are that soft, it is not "too" soft, but I would have guessed that they would be firmer than that. Anyone know off the top of their head what the spring rates for the Hothckis goodies are?
69 SS, ZZ430 Look-alike, Tremec TKO, Hotchkis Suspension