You are correct on HB/HPI. I also think the center diff bulks on the two look alike. I'm not sure if the part numbers would match up though, but it will be worth a look i'm sure.

J.

*edit*

Definitely not the same part, but the dimensions are similar. I think if I were to order the LS mount from Mike I could probably make it work. Might need the stock diff mounts for the LS as well though. It would be nice to have the measurements, it's quite difficult to determine from the pics on Tower, lol.

J. (again)