Build sheets were put under the seat and between the gas tank and trunk panel. the rocker panels should have a sprint emblem.... although easily added / deleted. If your vins end number starts with a 600001 definately a six cylinder ie. 223379L6????? I know the sprints w/ manuals have a damper on the tail housing. disc's were an option. PHS will be the only way to tell if the engine is gone! Good Luck!