You could always compare the shaft length of the shocks vs. the overall length of the shock and compare it to the ones you're replacing, unless, of course, you're replacing them because you popped one. I'd measure my travel with a tape or piece of rope and compare it to what the shock's specs are. They obviously have measured this stuff at the factory, and there's a reason the shocks you have aren't suggested for the truck you're going to put them on. There were at least two engineers who said the correct shock performed better than the one you now hold. Plus, they are so sure it's a better shock, they're willing to exchange it and pay the shipping. Think about that, they are willing to cut into their profit margin in order to get you a different shock....that's how sure they are that the ones you have aren't the best ones for your truck. For my money, I'd want the ones they think are best. Just because they work doesn't mean they are the best option.
