Cylinder head interchangeability

Starting to build a 2007 Hemi for a 68 Dart. The hemi is a car block. I plan to delete the MDS next and send it to the shop for some work. Ran across some heads on FB market place with Comp springs new push rods and lifters. The heads are 2012. Only 200 miles on them and the guy wants 700. My question is will the 2012 heads work on a 2007 block? And if so how will the Comp springs affect my cam choice when doing the MDS delete?

Thanks
5258 Mike