Hey. I was curious if anyone is familiar with late model 440 big blocks (75-78. I've heard so many different opinions on them. I've heard that the blocks are thinner, then I've heard they are actually thicker. I've been told they can only be bored .20 over and also that they can only be bored .30 over. I'm wanting a 440 that I can build up to be at least 450+ ponies.My question is can a late model 440 still be built up just as much as an earlier model. If some one can clear this up for me I'd really appreciate it. This 440 is for my 74 swinger