I have the c clamp to compress the springs in order to bolt down the center pins but theres no way it will go down. Im 6'2" 220 lbs and thats as far as i can get it, what do i do now?

And yes the weight of the truck is sitting on it to. 06 scab 4x4

 

The only thing I could think off hand is utilize another clamp on the other side and use a "Chester bar" or jack handle to work your turns on the c-clamp.

-cheater bar....damn auto correct lol!

 

I don't know if this will work but i looks to me that if you jack the frame up and let the axle drop your existing leafs will have the curvature similar to your new one and you should be able to get it then.

 

Well, 2 things you need a c clamp on the other side of the leaf pack and you need to drop the axle on that side way down.

 

drop the axle

 

I think you installed it wrong your add a leaf is below you factory helper spring, it should be opposite from the way you gave it. Ie, Helper - AAL - 2 long stock springs.

 

This is a good explanation with pictures of the process:
https://www.f150forum.com/f71/how-in...d-leafs-76932/