Tearing apart hemi 5.7, machine work worth it?

So, I am thinking here...back to my first dream engine w the dart.
I'm thinking cost to rebuild the hemi, getting it where I want, plus the $2000 in electronics to run it....would be pretty substantial. I still need to buy the 6speed tranny, bell housing adapter.

I found a company that will sell me a viper v10, w tranny, w wire harness, w computer for $8k including shipping......I may go this route. Save up a bit more and do that.

Sounds fun. My one question is, will it fit on a HemiDenny K member? I know I'll have cut the firewall out and modify the hell outta it. The sub frame was going to happen anyway....Im excited about this idea.