I have the opportunity to purchase a complete 272 Y-Block for my '50 Ford, but I don't know anything about the quality of the motor. In my mind, its been the perfect set-up that I've wanted for the Ford almost since the first moment I bought the car. But what's the quality? Do the heads crack easily? What about the block? I know that the distributor has a terrible problem with advancing because of the way that the vacuum on the transmission ran off of the vacuum of the whole engine. I already know how to fix that part. Outside of that, I'm clueless. Someone help me out. Thanks.