FINALLY GOT IT BACK!
X heads , Some of those warantee blocks had the thicker webbing you can add 4 bolt center mains and also thicker cylinder walls. It can be seen just by removing the timing cover by the larger machined surface. It will look like this same as an X block or T.A. block
X heads , Some of those warantee blocks had the thicker webbing you can add 4 bolt center mains and also thicker cylinder walls. It can be seen just by removing the timing cover by the larger machined surface. It will look like this same as an X block or T.A. block