273 adjustable rocker arms

dibbons said
When do the 273 rockers need to be ground for clearance? I just purchased some Comp 901 springs and was wondering if the factory adjustabel rockers need to be ground for spring clearance (stock 340 cam).

It depends on the spring diameter. I used the wrong springs but the head shop made them work. I had to grind some clearance for the spring top and retainer.