[LS1-450]

A few here & there. No web site or anything like that. Really, the key areas are the front k-frame w/ steering location & the locating & proper supporting of the rear end. There's a lot more to it, but, these two are most important. Am happy to send you pics of areas in question (if I have them) & answer questions. As stated though, your building a Miata w/ power levels that I am not familiar with. In a Miata, the higher one gets above the 400/400 mark, the more challenging the build.

I was thinking about your build this afternoon. For sure, I would suggest 31 spline differential & carrier. Also, would consider an alloy &/or hardened half shafts. Just doesn't seem to me that a 28 spline is gonna hold up as well to your power.