I went with Inland as that's the direction I was led when I was having vibration issues with the Mirada. The faster we went, the more frequent we would break tailshaft housings. That driveshaft had been "checked" at two different shops and deemed "ok". Although I had tailshafts stacked like cord wood, I was worried my supply would end. The piece I got from Inland stopped the breakage. I'm sure there are many other "performance" oriented driveline shops that could have achieved this also... just not the one that built our steel one
Strength in the aluminum shaft is usually met with larger diameter, but for the length the 3.5 diameter should hold anything I throw at it (and Inland agreed). I've also been "trying" to go the lighter route on parts within reason when I can. Lb here, lb there = LBS
If it isn't shiny are you asking if you can polish my shaft?