This 1970 Buick GSX spent years as a rusted, non-running wreck before a full restoration brought it back to its factory Saturn Yellow finish — one of just 491 built in that color out of 678 GSX cars total. Buick’s overlooked muscle car packed a 455 cubic-inch Stage 1 V8 rated at 360 horsepower, though real output likely ran closer to 376. Read on to find out what it took to bring a rolling wreck back to magazine-cover condition.