Read this whole thread. It seems that owners have succumbed to the 351W is better thing. The 351W is just another SBF. Nothing more. Most of the external parts are interchangeable with the 289/302. Also there are a couple of distinct advantages of the 289/302 over the 351W. BTW, all small block Ford motors are Ws and my 302 will go wherever your 351 can.
I did not know the 351 Cleveland was a big block. Learn something new every day!
As for the 351W vs. 302 debate, the 351W block has more potential and is stronger than the 302. The longer stroke is better for low end torque. The 302's shorter stroke allows for faster rev's. Yes, they are both small blocks, but not the same block. Very similar, yes, but not identical. Lots of shared components I will agree with. Not saying a 302 won't get you there, but a 351 will do it with less stress.
I am wondering what distinct advantages you are talking about? 351's usually get better gas mileage in Bronco's as they are less stressed, and you don't need the skinny pedal as much, so that's not it. Only thing I can think of is its ability to rev, which isn't exactly that important in an off road vehicle. On the street, especially in a Mustang or similar, the free revving engine is a blast, but not so much in a Bronco. Desert racing, maybe.