Like I said in your other thread,just be aware that the #87048D-16 retainers can sometimes cause rocker arm interference issues due to the deeper dish when your using certain rocker arms.
All depends on the specific combination of parts.
These days I feel just a bit safer recommending the #87048-16 retainers as SOP.
I would suggest buying one or two of each for a trial fit and then buy the rest after you decide which works better for the specific combo in question.
Also,always check the retainer to guide clearance,dont trust that it worked on somebody elses heads,be sure you have enough clearance on your heads.
You need @ least .050" or so clearance in there.
HTH
Bret P.
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