hey guys, still looking for my dream car; (1968-1972 chevy chevelle ss) and i just found one with “LS5″ and another with “L78″ in the description. I know pple are not gonna let these go cheap, but im doing my homework. I just wanna know what these terms mean. I know that a 454 engine is the “big boy” engine and there is another 396 class which also come on other classic ss model chevy muscles; i.e the monte carlo, and nova. I just can seem to find the correlation between these engine types and which one is more standard to get on the car! please help!