From another board...none of this is mine...I know nothing about it:

Here's some info from a former manager:

My name is "JC" and I was a District Sales Manager for Delhi Mfg., makers of Terry Bass Boats from 1975 thru 1980.

"What happened to Delhi?":
In the last quarter of '77 we were the #2 bass boat company in the nation...second only to Forest Wood's Ranger Boats, made in Arkansas. To the best of my recollection, we were the only two companies with dealerships all over the U.S.

Things started going sour. We made a better boat than Ranger, and it cost more, but hardly any company was meeting sales objectives by mid-'78. In the summer of '78 Terry/Delhi management met with Dick Woolworth, head of the Woolworth's Department Stores and parent company to Terry/Delhi. Because our sales were booming nationally we needed more manufacturing facilities, and a bigger plant overall. Dick had come down to discuss the possibility of Woolworth's loaning some major bucks to it's boat company.

At the time, gas had gone up to .79 cents per gallon and predictions were it would go to a dollar or more. This is bad for boat retailers and manufacturers. Jimmy Carter had allowed prime interest rates to go to well above 13% to 14%. At one point it hit 16%, as I recall. When a manufacturer sells a load of boats to a dealer, the dealer borrows the money to pay off the loan on a short note. His interest is most commonly based on the prime rate that the government charges banks and lenders, plus another 6% to 8% (at the time). As you can see dealers were having to pay from 18% to 24% to the IRS for the "privilige of doing business". High interest rates plus the "high" cost of gas were combining to make the cost of a high end bass boat out of reach for the average angler like me. At that meeting in Hot Springs, Ark. I told Woolworth that if prime interest stayed up, and the banks continued forcing another whammy on retail customers by charging the highest interest rates on consumer loans in decades, that the industry was doomed, and I estimated Terry could survive another 2 years.
Also, IRS had taken away the people's tax deduction on interest for car and boat loans. As I recall, we closed up shop 22 months later. However, we continued manufacturing aluminum boats and put other company's names on them. For instance, Bass Tracker, Sears, and several others.

I left the company. It was a real shame, but 35% of America's boat mfg. companies went out of business over that 2 year period. When Terry/Delhi cut back it wiped out the little town of Delhi, La., pop. about 1700, many of which were employed at our plant.

Did Terry/Delhi go out of business, or what?
As mentioned, they did go out of business per-say. Woolworth's, the parent company, stopped the fiberglass line. For your info Woolworth's also owned a company called "Woodstream". They were/are the makers of Victor Mouse traps plus the world's largest line of fur and big animal traps sold world wide.

As for seeing hulls that looked like Terry's, this is quite possible or maybe even probable. Many smaller bass boat companies got into business by "splashing" (copying) another company's hull. This saved thousands of dollars in design and tooling and I never heard of anyone getting proscecuted for it. I know of at least 2 companies who splashed our hulls. If you take them to court they immediately file bankruptcy and are gone. Only to pop up later under another company name. The state of Louisiana is full of "garage" boat companies who make one at a time and are often without Coast Guard or BIA certification, OR manufacturer's liability insurance.