Weeds - When you say the front of the truck is too high, we need to determine if the cause is (1) springs, (2) the way the IFS is mounted, or (3) tire size.
Now if your lower control arms are parallel to the ground, then the coils springs are right. The weight on the nose of your 'burb is around 1800 lbs. with SBC motor, TH350, P.S. P.B. etc. So your coil spring needs to be able to hold up 1800 lbs and have a spring rate of 350lbs, maybe 375 lbs. I'm not familiar with the Andereggen/Joyce IFS. I've seen guys bolt in late model Chevy/GMC 1/2 ton front IFS in the AD trucks and they always look too high to me. I think it's because of the way they are bolted up under the original AD frame. I've always used Camaro/Nova IFS or Mustang II IFS. If your control arms are level with the ground, and it looks too high to you, then your IFS was installed too tall. If your lower control arms are at a downward angle to the ground, then your springs are too stiff. The P235/75/15 tire is 29"tall. I've always run P205/75/15 tires on the front, they are 27" tall.
