Small Block LA rocker shaft hold downs

694spd said

Here is a picture of a set of factory 340 rocker arms that I have.
When you look at the push rod side of the arms. You can clearly see the difference in the offset of the cups.
Note: The arms might not be assembled in their correct positions.

View attachment 1715672735

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Reading thru these posts are helping me understand some things on my setup. Question, there is a notation that the rockers are clearanced for 340 valve springs.... what’s the difference or spring diameter that the clearance relief is critical. My 340 has rebuilt X heads so not sure what my spring diameter is or if the clearance is important in my case, but can’t let this new to me info slide in case it is important. Thanks, Casey.