I am helping my sister try to gather up what all would be needed to do a 5.7 or 6.4 swap into her 72 Dart. Currently a 318/904 with an 8 3/4 rear. Transmission is a big question. Yes, can go with a 727, but would be really nice to have OD. We would also like to keep from modifying the tunnel, so that might keep our options low. Gear Vendors on a 727? Or GM 4L60? Do those fit without modification? If we keep the stock front suspension, can you run headers or is clearance an issue? I know there are kits with unlocked computer and harness. I will take any advice you all can give so we can get a rough idea of cost.
Thank you so much for guidance!