To rake the front end you need to cut the neck not all the way through, and bend it to where you want it. Then you have to fabricate some plates and weld them in to take up the space you just created.
You also have to take into acount the height of the rear end. If you just rake your bike, your frame will be tilted at a downward angle so you have to lower the rear as well to keep the frame level.
And as for the longer forks, I'm sure there are some that bold right on because I also have a 1972 cb500 that was a chopper when I bought it with forks that were about six inches longer than stock. I'm not sure if there is a kit for that or if it is off another bike.