I wish I knew the specifics but I don't. After replacing all of my front-end parts I knew it had to be the box. I looked at the Borgeson box because of what you listed. I bought it from Rip at Source Automotive because he said it has performed great! If you trust the vendors you buy from & they suggest something, that's good enough for me. BTW, just got off the freeway & I LOVE the way this thing goes down the road FWIW... .
Clay
Clay