Re: matching a rod with a Pflueger 1558
The 1598 weighs in at 9.8 oz. You could match it up with a 9 foot 8, 9 or 10 weight rod. To put this in perspective, other reels like the Billy Pate Bonefish (for 7, 8 and 9 weights) weighs 8.5 oz, and the Tibor Riptide (for line weights 9, 10, and 11) weighs 9.5 oz.
It doesn’t have much of a backing capacity—maybe 70 yds of 20lb Dacron with a floating WF line in those weights, and it has a simple click and pawl drag (plus “rim control”).
As you know, it’s not exactly a high performance reel for salt water speedsters, but for many fish it would be perfectly fine as a backup/budget reel for stuff like freshwater bass, and light occasional use in saltwater for small schoolie striped bass or redfish etc. and for any other fish that you could reasonably expect would not be making long sustained runs and where fighting from a reel with a smooth drag and lot’s of backing would be necessary. (Even though you could theoretically increase the backing capacity to an "acceptable" 200 yds or so by switching to gel spun backing the reel doesn't have close tolerances, so you'll have problems with GS slipping between the spool and frame, and you are also likely to get cut VERY badly if you do hook into anything that takes you into your backing because of the combination of thin diameter of the GS and the reel's simple drag.)
My first SW reel in the 70’s was a Pflueger 1498 (same size and weight but without rim control) that I matched up with a no name bargain bin 9 weight graphite. It has done itself proud on many stripers over the years and still gets a few outings each year. In addition to a graphite you could match it up with something like a vintage glass rod-- maybe a Heddon?
If you take it in SW be sure to wash it thoroughly in Fresh water after each use.