Rockers and rocker shafts 340
You are correct about the machined pockets found on the factory 340 rocker arms.
This was done to add clearance due to the larger diameter springs that the 340's had.
Here is a picture of a original set of rocker 340 rocker arms and shafts that I have.
The red arrow points to one of the arms where the spring clearancing was done.
You are correct about the machined pockets found on the factory 340 rocker arms.
This was done to add clearance due to the larger diameter springs that the 340's had.
Here is a picture of a original set of rocker 340 rocker arms and shafts that I have.
The red arrow points to one of the arms where the spring clearancing was done.