Help evaluating this car...69 DART

ad states he has a 400 for cheap, buy the whole package, build the 400 ($4,000) and burn tires till your bored with it. Resale is going to be way easier with a mopar engine in it. IF you put a chevy in it your going to find it almost impossible to get rid of later and have to give it away. So your options are spend money now to have a killer car (mopar engine) or build it the way you described and lose money later. Math can be tough sometimes, what to do, What to do?