If you're running a .063 T-bar and 30wt in the shocks w/ no other springs, that is going to act "stiff" because your T-bar now has to provide all the rebound - the thin T-bar is not going to be able to do that against the VCS shocks - it can do it against dampner disks but not the shocks. Try green springs, 20 or 25wt oil for the side shocks w/o the tweak screws - or, try to get the dampner disk setup as discussed a while back.
Nonetheless, that will be a minor tweak compared to getting some "gumball" tires on the car though.