Hellcat crate motor in 68 Dart?

OJ my what did I do!!!! Just ordered a hellcat crate motor and all the stuff that goes with it.... I have no idea what I am doing, but it seemed to be a good thing to do at the time! Kind of like, "hold my beer and watch this"...type of thing. Next question do I try and stick it in my 68 dart which was going to be a hemi clone car or save the motor and look for an 70-71 ebody which has more intrinsic value when it is done. Restoration cost would be basically the same for either car, but sadly the cuda or challenger is worth way more when completed. I think I am in way over my head in this whole deal, but as I said seemed like a good idea at the time. Comments and advice as always would be appreciated. OMG what have I done!