Crankcase Breather

[Richard Taylor <n196x@mindspring.com>]

Amici,

To breath or not to breath, that is the question. I understand that earlier
TR-3-4 motors had a breather down there at the bottom flange of the block
and that later blocks had them plugged up.  What's the true skinny...what's
the preferred M.O. for crankcase breathing?
Thanks,
Richard Taylor
Atlanta