There are a number of things to consider when doing this conversion, and each person may have different ideas as to the best way of doing things. In the end, the best way is the way that works for you, and the way that you feel confident. After all, its you who is going to be riding and enjoying this new beast.
The front end basically goes straight on using the LC tapered bearings. All that is needed is a 5mm spacer under the bottom bearing to stop the bottom triple clamp from rubbing on the frame of the bike.
Firstly, you need to decide on the clocks/guages that you will be using. In my project, I decided on the LC guages to ensure that no wiring modifications needed to be done. I have also used the standard LC ignition switch for the same reason.
The top RGV triple clamp has a couple of mounting points which can be used to mount the standard LC ignition switch if the holes in the switch are opened out a little.
For my project, I also used these mounts for the clocks by making up a couple of small aluminium brackets and 6mm spacers. (Spacers are so the ignition switch doesnt stick too far through the triple clamp).

The bracket thickness is about 6mm.
Length is 65mm
Width 28mm
7mm holes
Hole centres 43mm

The ends of these brackets should be rounded to allow them to be angled into the ignition switch mounts, and for looks.
The original steering lock bracket on the steering head should be ground off to allow the ignition switch to clear.
You can then drill and tap the steering head and screw in a 10mm (or 1/4) bolt for the new steering lock.
The top triple clamp will need to be filed a little to allow the LC ignition switch to fit into the hole.
You will need to grind/cut down the steering lock pin to the right length so that the key can be turned all the way to the lock position, while keeping the pin as close to the steering head as possible to ensure a good lock.





The original LC steering stop no longer works with the RGV triple clamp.
The easiest way I have found to make a new steering stop is to drill and tap the stops on the RGV triple clamp.
In doing this, you can then put a couple of bolts through the triple clamp and make the stops adjustable.
You may want to work out a different way of doing this, because as you can see in the picture below, the bolts meet the frame at a fair angle.



The RGV speedometer cable will screw straight into the standard LC clocks.



I have used the standard 350LC master cylinder for the front brakes.