When I was younger, our family had owned 4 or 5 different 2002. Rust is a problem on all BMW of this era. The 4 cylinder engine is easy to work on. I could remove the head in two hours. Aluminum head with iron bottom. Over heating was a problem causing a warped head, but easily solved by replacing the radiator with a stagger tube radiator. A/C was a joke, robbed a lot of HP and delivered little cold air. The 74, 75, 76 models had emission controls that allowed the use of leaded fuel when most manufactures were switching to unleaded only. The car is a bast to drive. Lots of room in the back seat and truck for a car its size. The 4 speed trans was reliable. Only issue was worn out syncronizers after about 70K. Front disk brakes and rear drums. No power steering. Best bet is a carb engine with an after market weber. Dual side draft webers was a popular setup. The 4 cyl was buzzy at highway speeds due to the low gearing. The engine would turn around 3300rpm at 70mph.