Yes, someone drilled them out and mounted new studs to get the big bolt pattern. Not a terrible thing, and it looks like a competent job. The concern is the narrow amount of "meat" on the outside of the new studs.
You could always just knock those out and go back to small bolt pattern... with extra "lightening holes"...
Ha! lightening holes... funny. Right, that is true. The rear is the bigger bolt pattern but I'm not sure I care that much. I like the idea of keeping it stock if it all works ok. Just easier to work on and maintain.
