Thought I'd throw this out there for those looking at a 35 spline diff for a 9". I know we've had a few threads come up about 9" diffs.
I have Strange axles and wanted to run their nodular case. I was planning to order up a Wavetrac and ship it to Strange for assembly in their case. Between the time I purchased the axles and I got ready to place the order for the gear case, Strange released this new 35 spline torsen style diff of their own called the "S-Trac". Sounded like a nice piece and I felt it was worth a shot since I could get it all from one source. Time will tell how it performs but everything I've heard from those involved in testing is very positive.
Oh, and about the time I started spec'ing out the case buildup they released a new thru-bolted aluminum gear case

. This thing is beefy. HUGE caps. I had no plan to run an aluminum center but there isn't much difference in price.
After some backorder delays on the case and then diff parts, it finally arrived last week. Here are some pics for those interested.