Fixing the plastic rocker arm buttons

[Gunfreak25]

Found this picture tonight of the differences between the early 6.2 cast rocker assemblies and the later 6.5 stamped rocker assemblies. The picture is a little past halfway down the page. Keep reading for more info:

Wrench's Engine Thread - CK5 Blazer Forums

And after some searching, the plastic buttons on the newer style rocker arms can be replaced with DIY hardware, link below.

Rocker Arm retainer replacement alternative? - Diesel Place : Chevrolet and GMC Diesel Truck Forums