I don’t know that specific model, but I’m not aware of any production boats from that era (or any other era really) that used epoxy. They may have also used some vinylester below the waterline to prevent osmotic blistering. Polyester is much less expensive for manufacturers and in some ways easier for them to work with, for example when applying gelcoat.
For a (presumably structural) hull repair I’d use epoxy regardless of the underlying resin. Epoxy sticks perfectly well to polyester, vinylester, and epoxy, as long as the surfaces are prepped properly. Polyester is more temperamental about getting a good bond to the underlying material, the cost difference on the scale of a typical DIY job is not that great, and polyester has a shorter shelf life so it’s less likely any leftover can be saved for future jobs. If the area will be over coated with gelcoat and not paint epoxy is a little trickier, but there are ways to manage that, and I’d rather worry about how to get a good bond for the cosmetic layers than for the structural ones.