Hi, thanks for the comments on the 4runner build. yeah i also ordered through filthy motorsports and thought I also got the wrong front springs. Mine are 550, which is what Ben recommended, then I def had to dial in some preload to get the ride height correct. He strongly cautioned against using too heavy a spring up front if I hadn't dialed in much preload. he was right, and talked me out of ordering 650s which a lot of people apparently incorrectly do.
Because i'm using aluminum armor and front low pro bumper, I might be 30-40 lbs lighter than a steel setup, but maybe you can still get away with 550s and preload. what controls front dive is more about valving than spring. spring and preload is just for supporting the vehicle at the correct height. valviing will control how fast the oil moves through the shock.
I can do some measurements later today and post them here.