318 Swap

Are you keeping the 7 1/4 rear or upgrading? If you upgrade your /6 driveshaft won't work, it will most likely be too long. It might even be too long now with the V8 904, I can't remember.
If and when you find the kickdown linkage, it might have a bracket that bolts to your intake, that will also have a spot for your gas pedal cable to attach to. You can modify the end that goes to your carb a little and make it work.
I believe your upper rad hose will be different, the lower one mightttt be.