Early 273 LA bolt on timing marks? 2 kinds?

[65Abodies]

I've got a couple of 273 engines that I'm working on. I just noticed something interesting. There are 2 different bolt on timing marks.

One shows

0 -
_
10-
_

The other shows
10-
AFTER
-
0-
-
10-
Before
-
I'm assuming the second one is from a newer 273. The 0 is in 2 different places. Perhaps 10º apart. What goes with what? I wish I'd have noticed before I started taking things apart. I incorrectly assumed that there were 2 kinds. Bolt on on the LHS and cast in of the RHS. Apperently there are more options.

 

[xLURKxDOGx]

I've got a couple of 273 engines that I'm working on. I just noticed something interesting. There are 2 different bolt on timing marks.

One shows

0 -
_
10-
_

The other shows
10-
AFTER
-
0-
-
10-
Before
-
I'm assuming the second one is from a newer 273. The 0 is in 2 different places. Perhaps 10º apart. What goes with what? I wish I'd have noticed before I started taking things apart. I incorrectly assumed that there were 2 kinds. Bolt on on the LHS and cast in of the RHS. Apperently there are more options.

There are 2 different ones that I know of, the smaller of the 2 is one you find on poly 318 engines and the other larger one is correct for 273 engines.

Jake

 

[Dana67Dart]

10 after / 10 before is what is on my 67 273