Hellcat crate motor in 68 Dart?

I guess the same way you get a 750hp gen 2 hemi to hook. Mini tubs, slicks and a caltracs system?? Regarding the build, it looks like my 68 roller is going to find a home in my garage so might as well get the money gun out. Realistically I would have 20k in a gen2 cross ram hemi, trans cost about the same, radiator and such would be a wash so the decision comes down to the knowledge to complete a gen 3 build or continue with my hemi dart clone plans. Either way it realistically will be close to 50k all said and done....or more if things go as usual. Not a light decision either way...Thanks.