scott12180 Posted January 19, 2019 Share Posted January 19, 2019 Just a general question on the 305 cubic inch Zephyr engine for 1942. I've heard that by boring out the block to be a 305, these engines are prone to cracking. That's one reason why after the War they went back to the 292, I understand. If one were to find a running 1942 Zephyr which has been been rebuilt, would you have a risk that the block may crack under normal use? For instance, I once owned a 1938 Packard Super 8, and learned that these blocks are prone to cracking. If you're engine isn't cracked now, it probably will be soon if you drive it much. -- Luke Link to comment Share on other sites More sharing options...
Ken/Alabama Posted January 20, 2019 Share Posted January 20, 2019 My 292 is bored .060 over 2 7/8". That's only .0025 from 2 15/16". I have no heating issues. Link to comment Share on other sites More sharing options...
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