Front extended shackles?

[Hilux92]

I have 4" spring pacs in the front of my hilux but my ford V6 is heavy and it sags a bit more than it should. Would 50mm extended shackles have any negative effect if I install them? Would my front leaf packs go flat? I was thinking of adding another short blade in the pack as well. The are ProComp packs.

[jimbo74]

adding longer shackles is fine....

[Rocksurfer]

2 inches isn't that big of a deal on a shackle, that's what I've always run on my trucks.

[79coyotefrg]

if your not getting enough lift  then add another long leaf in the packs