How much can a 1975 Impala glass house worth wih Original paint
Im thinking about buying but have no idea on this market of cars.Im and old Volkwagen collector.

The 1975 Impala was not among the more popular versions of the car: the 176,376 sold was the lowest amount in the Impala's history.
The Landau trim was introduced in 1975, but to little fanfare; fewer than 2500 of the Landaus were sold that year.
The base engine was a 350-ci V8 rated at 145 horsepower, while optional engines ranged to a 454-ci V8 rated at 235 horsepower.
Im thinking about buying but have no idea on this market of cars.Im and old Volkwagen collector.
Engine did have a bad cam so I installed a new one. I can cruise around town but if I try to pass someone or speed up it goes no where. Will sometimes backfire while crusing. Also causes the trans to shift funny when on the gas. Any help would be greatly appreciated. I made sure firing order and timing were correct. All vaccum lines are hooked up. Even the one to the trans. Wich would normally cause the shifting problem. I'm thinking it could be the carb getting to much fuel seeing as the carb was off another 350 that wasn't running right. So it was adjusted to run decently till I got this engine going. I do have a mechanic as a father but he hasn't had the time to be able to look at it. So I'm stuck trying to figure it out myself and am kinda stuck.
1975 impala 350