the quick list:
- V8 904
- Either adapting motor mounts or a V8 K-frame
- Exhaust plan for the V8
- If the 318 is from a truck, you'll need a car oil pan and pickup tube
- kickdown linkage for the V8. Your throttle cable from the /6 will work
- Does the 318 come with the pulleys/brackets? something to consider
- Radiator - probably best to go with a V8 radiator, although some have used the /6.
- Of course, the simple things like alternator wires and such can all be worked with pretty easily.
Relatively a pretty easy swap.