Torsion bar installation

I'm just in the process of installing larger Torsion bars to my A body. Just wondering if anyone can tell me the correct way to install them as per the factory service manual. Do i install without spindles attached, if so should LCA be fully down and just raise up till bar pops in; Do i install with spindles attached and use a trolley jack ? looking for the correct way to do it.
Cheers