Rocker shaft hold downs

The instructions in the Hughes rocker holdown kit covers part number 7440 and 7442. The very first paragraph states as follows..."These heavy duty hold-downsare not "drop on" and require custom fitting. Careful attention to our installation intructions will give you the best results".

Then at the bottom of the instruction sheet in the last paragraph is says..
"Tips: If it becomes necessary to remove material from the ends of the hold-downs, keep the cut as square as possible. De-burr before final assembly.

The instructions say that the part number 7442 is for big blocks and the 7440 is for the small blocks.

Like I said before, maybe they aare using something different now that I'm not aware of but if not, user beware. Some machining "may" be necessary depending on your particular setup.

I hope this info helps.