My first LF camera was a Graphic View II. I still have it and use it occasionally. The weak spot on these cameras is the combination rail clamp/tripod mount. If yours is in good condition, then you are good to go. Side-to-side tilt is, however, not possible; leveling has to be done with the tripod. I had a custom clamp made with a regular tripod mounting screw socket and now use a conventional pan/tilt tripod head.
You will learn quickly about lenses with different amounts of coverage. For example, it is possible to have a 90mm lens that projects a 260mm image circle and allows a lot of movements on 4x5 and another 90mm lens that projects only a 170mm image circle (or less) and allows almost no movements. The former will be bigger and more expensive than the latter. As mentioned above, you can still use back swings and tilts with lenses with smaller image circles, since these keep the film within the projected image circle, but front movements and rise/fall and shift are out. If you find you want to use more movements, a 90mm Schneider Super Angulon or Rodenstock Grandagon or Nikkor/Fuji SW series lens can be picked up for not too much these days used and will offer you a lot more.
One caveat about using the 90mm on your Graphic View (especially if you have the II). It's easy to get the rail in the image area. When I use my 90mm Super Angulon (on a recessed board, BTW) on the Graphic View, I make sure I have both standards in front of the tripod mount and the rail well back. The 135mm will present no problems in this regard.
The Graphic View II may not have all the bells and whistles that a Sinar may have, but it has all the movements you'll likely ever need and is a more-than-capable camera. I still use mine for table-top work or other times when I need a monorail instead of my usual wooden folder.
Might I suggest you take a look at the Large Format home page here:
http://www.largeformatphotography.info/ and peruse the articles there. There's a wealth of info there for the beginner and advanced LF photographer.
Best,
Doremus