As previously said there are some big differences between the 351W and the 351C. One of the biggest thing about the clevelands were the heads. They used heads with a canted valve kinda like the chev 350 uses. They are said to be one of the more powerful small block heads that ford made. The block also boasts many differences in that the water jackets are different and the blocks are usually 4 bolt main blocks. Some of the clevelands actually took parts from the boss mustang. I know the cleveland in my dads car was built using the Boss crank and its supposed to be good to like 8000. They are very well built engines and great for modding the only disadvantage is finding a good one and the aftermarket parts arent as readily available.
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