strange1:
The Harsh Terrain arms fit just fine. The calipers have to be mounted upside down due to interference. With them upside down there was just a little interference which was easily solved with a little caliper grinding. There seem to be two drawbacks so far; the calipers have to be removed to be bled so you can make the bleeder screws be at the top, and the brake line contacts the steering arm lightly - I put a short piece of rubber hose around the brake line to protect it which seems to be working fine.
I should also mention that I was very pleased with the customer service at Harsh Terrain. This is my second set of arms from them. The first set was reamed for a pitman arm end instead of a draglink end. Aaron got me the new set of arms VERY quickly, and was super nice about it. It was just a simple mix up at his machinist's place.
If I had it to over again, I would have had them shipped with a straight hole, and had them reamed locally. Jon at ECGS reamed my pitman arm, and it was perfect. I would rather have had him do the arms as well because he was quite methodical about it. Having it done locally affords you the chance to say how deep you want the taper vs just getting a "1-ton Chevy taper" hole reamed.
I have tons of clearance between the oil pan and tie rod, no worries there.
Mac5005:
I've gone wheeling with it a few times, and a very small bit of road/gravel road driving. I have zero bumpsteer. My draglink is at a really good angle, and I don't run a trackbar so there's no alignment issues there. I am fighting a pretty good case of death wobble, but I attribute that to my 8* of caster. I got a little caster happy! lol I'm going to try some 4* steel caster shims and see if that helps...
csudman:
Can't speak for the Astro box, I've never looked into them...