67 Dart 273 swap to 383
All of that can be done if you have fabrication skills. 67's have a long bushing on the column that needs to be shaved for the exhaust manifolds to fit. Radiators can be bought, and you probably have a 904 trans so your driveshaft needs to be shortened. A/C can be used, and power steering too as they put that in late 68 early 69 383 Darts.