Does The Z66 Have Front Torsion  bars?

I know the Z71 and all 4 wheel drive Avalanches do but how is the Z66 set up? The reason I am asking is that I have heard of some owners of other GM trucks putting Ford torsion bar keys in their trucks to raise the front end. I would like to get my Z66 setting level, has anyone done this to a Z66? How hard is the install and what is the cost to have it done?

Butch

my 03 z66 wbh does have torsion bar in the front.

My '02 Z66 has torsion bars up front as well.

Vetman