I would think a B or RB would hang out the sides of the hood a little.
As far as instalation, other then space requirements, I suspect either would require about the same amount of work. A lot will depend on how you want the finished product to look. For a look like its the factory install, I would think the LA would make life easier, but if your going for a get down to business go fast look, it would be a toss up. Gene