Ed. I owned a bow custom made for you a while back, a 66-inch longbow. Your draw length is only an inch longer than mine. No danger of that one blowing up, at least not due to over stressing the limbs.
Regardless, most bowyers don't really build to a specific draw length; they build a bow with the intent of coming out with a specific draw weight at 28 inches. If the buyer wants the bow marked at 26 or 30 inches, they mark it accordingly. For example, if a customer wants a bow to draw 45# at 26 inches, the bowyer just builds his standard 50# bow at 28 inches and marks it 45# at 26 inches.
Granted, some do build for optimal performance at a specific draw length, and those bows aren't as marketable on the secondary market, particularly if they were built for a relatively short draw length, as bows built with a 28-inch draw length in mind. Of course, folks should pay attention to how the bow is marked so they know the draw weight of the bow at their draw length.
Most problems occur when folks with long draw lengths try to shoot bows that are too short. Short "longbows" have been a fad for a while now. Some with a lot of deflex coming off the riser may hold up to a long draw, but for a lot of others, a long draw really stresses the bow, and some fail as a result. Given the number of long draw shooters shooting short bows, I'm surprised a lot more don't break.