6.4 392 in a 66 dart Gt

You going to keep the electronic trans? Youll need to gut the old tunnel and crossmember and starrt from scratch. If you can keep a 904, youll be months ahead depending on how fast you work. Now an SRT4 motor would be way cool in a 66! 300 hp out of 400 lbs? Ans of course mate it to a dakota 5 speed or whatever bolts to a 2.x block.