[Will N]

Contributing to the issue of the gasket blow outs between the outermost cylinders is the fact that the only copper gaskets you can get now are really thin between cylinders 1/2 and 3/4. They're made this way now to allow for the overbore that most rebuilt engines have. Earlier versions of this gasket have much more material between the cylinders. I've horded a few of these earlier version. BTW, have you seen the prices for these copper gaskets recently? Wowza.