Congrats. I would still suggest recapping. KLH sadly used some rather not long lived caps so, it is only a matter of time and likely the originals if that is what you have are way out of spec.
Get the sealer from vintage-ar to do the surrounds right and not have issues later. The price may seem a bit stiff but most persons spend more on a pack of cigs. Lastly, make sure you replace the driver to baffle gaskets, especially if they have the caulk, mortite that while seemingly still okay just will not get the job done. A roll of closed cell foam at the local hardware store cost me about CDN$4.00 and was enought to do the job. I used 1/8x3/8 and did a double strip on each woofer.