I wanted to get info on this center section I saw last night. Pics are not h Th e best and didn’t have room to maneuver things very well.
Why not just call Speedway? They are still in Sylmar. I wouldn't run a midget rear end with anything more than a mild 4 banger.
FWIW, I ran Speedway Engineering stuff when I raced dirt and I always got good service and good parts. Good luck.
Call Kenny @ Speedway Engineering you won’t find anyone nicer or more help. That rear end is actually quite strong.
Those quicks are stronger than you think. The Vanderly roadster went over 200 at Bonneville using one and I believe there was one in the the first flathead powered Flat Fire. Streamliner.