Depends how old the kit is. I think a long time ago they were made in the US, maybe Moldex or someone like that. Then they switched to SCAT as the supplier.

The guys who ran MP for years didn't really care about quality or fit and finish so it is a crap shoot. I've never heard anything bad about the MP cranks other than the fact that they are heavy and that they use a Mopar size rod journal.

Mopar Performance refused to accept the fact that the 2.200 journal worked just fine. They continued to use the gigantic Mopar rod journal up until the very end. But if it is a complete rotating assembly and it fits in your block then it should be fine. Don't pay more than Molnar or 440Source prices though. MP used to charge a ton for the stroker cranks but they aren't worth what they charged. It isn't like they were selling Callies or Winbergs or something like that. It is most likely just a reboxed SCAT crank.