I got the +1's and it sat lower than stock. Got tired of getting my lower g=back beat up on the street, so I went with to Passenger side 2800- 3000lbs 68 a-body Super Stock springs. They are by far the best riding springs I've ever had in the car, 1 1970 e-body with 440 & Dana. The car transfers weight better and seems to launch harder than with the Caltracs, but that is on the street, not on a smooth track with slicks.

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)