The CHB's you describe were the original "affordable" trawler. They were also sold under the "Marine Trader" and "La Paz" names.
Overall, these boats, almost identical in design, were built by several different yards and had VERY different levels of original quality. There are no "hard" rules here--some boats were quite good, some were terrible. Over the years, some boats have gotten better, some have gotten worse. Some shortcomings are fixable (e.g., the hose clamp and wiring issues mentioned above) and some are not (too-thin fiberglass, wood stringers open to bilge water intrusion.)
Don't just get it surveyed--start looking NOW for a surveyor very familiar with this model, and have a preliminary discussion with them. Pay the hourly rate for the discussion. What you'll learn will be more than worth it.
Those issues aside, these were kickin' boats. Separate cabins with separate heads in most configurations, and even twin engines in some, which still fascinates me. (I'm a twin engine guy.) I once saw three different models of this hull at the same marina (standard double cabin, "Europa", and a large-deck single cabin "sportfisher".) Still sorry I didn't take photos.
BTG