Welcome to the forum LMaruko. How long did the car sit before you bought it? Does it have fresh gas in it. Did you set the plugs to the correct gap? If it ran good before you started working on it then more then likely it's something you did to it. On a car this old you should replace the air filter and spark plug wires also. A clogged air filter will richen the air/fuel mixture which could be why you see smoke and smell gas. Broken spark plug wires won't allow a good strong spark at the plug which could cause a rough running engine and incomplete burning of the air/fuel mixture. Also check all of the vacuum lines for leaks (cracks) or loose connections. Old vacuum lines become brittle and may not fit tight on the connections-maybe you knocked one off. There's a few things for you to check-good luck.