Need help identifying these???

I have 3 sets of these that were supposed to be for "CJ" heads, however that is not the case, I am not sure what these fit. The stud spacing is too wide for a CJ, not sure if it may fit a "C" head, or profiler, Thor...
Any help on what these are for?
Only part # is the "SG-6B"
They also have an "I" & "E" ( intake / exhaust) etched in them along with the part # & the letters "PEP"

dfree383 wrote:C460, Profiler and Thor heads have never used stud mounted rockers to my knowledge.

Have you tried P-51 or Kaase SCJ heads?

Thats what I thought as well, from what I have found on the net these are the same as Comp Cams #4017
which is for the TFS A-460 head.
the "PEP" thats etched in the girdle stands for "PRECISION ENGINE PARTS" as per info i have come across in some old fourms....