How do you tell a 454 cubic inch engine from a 427 cubic inch engine?

the only real diff is 454 has a longer through on crank the appearance is all the same is it a car block or truck block a truck block deck height is higher than car block manifolds wont interchange or distributor if its a truck block throw it away it will say truck on the back below where trans bolts most likely a 454 and if u really want to know call the parts stor they will tell uwere to look for casting #. these engine's are no good unless u think u r going to run more than 500 hp or in a truck u r defeating the power to weight ratio concept.