I've got a slant six in my 1980 Diplomat coupe and I am looking at buying a low mile (29,000) 318/904 combo to swap in it. A few concerns I have are as follows: It is my daily driver and cannot be down for much longer than a weekend. Is my current driveshaft going to work with this swap? Any linkage differences between a slant 904 versus small block 904? I have the Schumacher mounts to convert the K frame, so no issue there. Is it possible to get this done in a couple days, provided there are no unexpected catastrophes? I believe it is a lean burn engine, which can be done away with later. Also, I am aware that an exhaust system is necessary to drive the car so I will schedule an appointment to deal with that once I have the engine in.