Not ECM related...

[Dave Williams]

-> AFAIK, I've never seen a factory production 4.3l head w/ screw in
-> studs.  I've had a few 96 and 97's apart. ; )

 I have a '94 with them.  They're crummy positive-stop studs, though,
for the non-adjustable rockers.
                                                                                                            
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