Yes it is a narrowed chevy 10 bolt under there with the stock Datsun springs. The guy who originally built it used the stock Datsun hub and redrilled holes into the hub itself and welded the studs in. If I could I would get an original Datsun hub and just put it back to 6 lug and hopefully find the same wheel just in 6 lug to match the rears, or get wheel adapters, but for now I will just cross my fingers that they dont start cracking off.