Get the List
I called Vans and they emailed me the packing list of the FWF for my IO-360 configuration. I then used "the list" on Vans website to breakdown each part and bag to see what they were. From there I chose what to delete. You will want to think carefully (as usual) about what you want for baffles, oil cooler, cube location, air box (stainless ?), and other systems and sub systems. There are included drawings and instructions mixed with the subkits too. If you are going very standard, then it makes things a lot easier.
If you use the Plane Power alternator, be sure to hand fit the bolts that screw into the engine. Mine had thread inference due to inadequate washers. I called PP about it. I only needed an additional .063 washer to make it right.
After looking at the packing list, you might direct more specific questions to the group here.
What avionics do you have? Specifically manifold pressure. On mine, the tap is to the rear cylinder on the R/S. But the G3X sensor is mounted to the sensor manifold on the left. The FWF kit comes with a sub-kit but it uses different hardware penetrating the R/S FW. I will be using a custom hose for that connection.
Happy planning!