Quote: Originally Posted by nokturnalstang View Post A big block is a bigger cubic inch motor and larger in size then a small block, a small block is smaller. a shorthblock is just a motor thst has the block, cranks and pistons, thaats it. longblock has all the same as a shortblock plus heads and other dressings. is there a line drawn somewhere? imean like i wouldent call a 4.6 a big block, as opp