Ok so I'm new here and vary sorry if this has come up in the past but I messed up, I order everything for my z3 block as k24 stuff well I was able to swap out the rods to properly fit my z3 but they wouldn't take back my pistons. So my question is being that I've already had this block mechine work done can I safety throw the k24 87 mm 12.5:1 cr pistons in my k20z3 block and be able to put the z3 head back on with out having valves bend?

 

If you have machined the K20 block for the Wiseco pistons that you have pictured above and you use the K20 Manley rods, you will be just fine.