S&S Adjustable Pushrod Set

In a word, absolutely. S&S pushrods are stronger and more durable than the OEM 'rods that they replace and they'll work with a wide variety of lifters, Crane lifters included.

With the Quickee pushrods, you won't need to remove the lifter block in order to complete the installation, which is rather convenient. In the case of other adjustable pushrod sets we have, you're going to need to do a lot more work in order to complete the installation. You save quite a bit of time with the Quickee pushrods. Otherwise, as far as quality and longevity is concerned, unless you're doing a massive engine build and going for big power - the Quickee pushrods are the way to go. Of course, in the instance you are doing a big job and you're already taking the engine apart, the nice thing about the standard adjustable pushrods is that they're lighter and there's one less point of (potential) failure. So, from a reliability standpoint, and that's not to say the Quickee rods are bad, because they're not - if you're looking to eliminate any potential failure point, the standard adjustable pushrods would be the way to go.

You're indeed correct in that, you'll need 84-99 pushrod covers in order to install the adjustable pushrods on your bike. While you could buy the covers separately, your best bet would be to purchase an S&S Quickee Pushrod Conversion Kit instead. It has everything you need to get the job done and will certainly go well with those cams.