Best way to further lower my 1968 Camaro

[6carmello8]

I want to go lower in the front about 1.5 ~ 2 inches but I only have about .5" left until I hit bottom on the thread that's let on the coilovers.

Even with .5" left on the lower part of the thread the car is not sitting all that low.

Sorry I don't have a picture.

I know the options but I want to hear some opinions.

Here is some info regarding my set up.

Front:
18 x 18.5 255/35/18
QA-1 Adjustable coil overs
Global west control arms
no sway bar yet

Rear:
18x11 305/30/19
Rear DSE leaf w/ 2" drop