kcoyle - a later 318 will look very similar to a 65 273. The main difference would be the angle of the intake bolts. on a 65 motor, the bolts go into the heads vertically, on a 66 or later engine they go in at an angle perpendicular to the side of the heads. More or less parallel to the deck of the block. To answer your question the later 318 will bolt up perfectly to your cable shifted automatic. The only thing needed is an adapter ring for the crank register on the torque converter. A simple ring of metal is all thats needed. If you know someone that has a metal lathe they can turn one down for you in short order. I think there used to be an outfit called wildcat auto parts located in Washington state that has these adapter rings as well. google them or do a search on this site for them.
