I don't know that there is a serial number guide to track down the year made for CVA.
CVA Kentucky Pistols used two different lock styles during their production. The very early ones had poorly tempered internal parts and the parts frequently wore out prematurely. They switched to a better lock with an adjustable sear around 1973. Slightly later, they used the same lock plates, but had better internal parts including a fly in the tumbler and a bridle. The later lock plates were what is commonly called a Maislin style. As CVA got further into production, they used better quality rilfling and by 1990, the rifling they used was the best of any in production guns for round ball shooting, The 1984 Catalogue Color case hardened lock plate Internal features: screw adjustable sear engagement, authenttic V-type main spring. Stock: select hardwood, Barrel 10 1/4 inch Oct, 7/8 across the flats Rifling eight lands, deep grooves
Trigger early style
Front sight: dovetail, brass blade
rear sight: fixed open dovetail
Finsish: solid brass trigger guard, nose cap and thimbles
Accessories: stainless steel nipple or flash hole liner, hardwood ram rod with brass tips
Length OA 15 1/4 inches
Weight: 40oz
45 cal perc finished $94.95
45 cal perc kit $62.95
45 Flint kit $73.95
KA709 was the manufacturer's stock/model number for the 45 perc kit
The CVA Kentucky Pistol kit (flint) that I got in 1973 had no letters or numbers engraved on the barrel. At that time is was pretty much a bag of parts inside a funky wood grained colored card board box.
Although That CVA company went through a bankruptcy and stopped production of the earlier side lock pistols. The same locks and many of the parts were used on several other CVA models and to this day on somee traditions models. So parts can usually be found.
The ram rod that comes with the kit, it pretty much for looks. I would make up a completely new range road for loading and cleaning. Get some straight grained hickory doweling about 14 inches long in 3/8 or 11/32 and firmly attach a good wooden knob or handle to one end and a combo cleaning jag ram/rod end on the other end. If you ever dry ball in that gun, you will need the sturdiesst set up possible to pull the ball.
A patched round ball, 440 or 445 and 20 grains of 3fg should be a good starter load. If it has the deep round ball rifling, I would use the 440 ball and a thick cotton flannel patch. They had some pretty deep rifling to seal. You can probably use the same ball starter that you use for your rifle.