I had a bad lifter when I got my LS7 lifters as well. I got another set and they have been fine going on 3yrs now.. When I did my H/C/I on my motor I bought some 7.4 pushrods thinking I would be good but actually my setup called for 7.3 length. I had to get 7.3's. Maybe the pushrod length is the culprit behind your noise??
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Jeff
2002 WS6 T/A.. M6..Built 383 TMR tune..461rwhp,458rwtq
2009 G8 GT. Bone stock 13.6@103.. Vararam Intake, GXP Axlebacks, LS2 FRC's
1998 Corvette Convertible, Vararam Intake+Power Duct, Fast 90/90, Ti Axleback..12.8@110
2003 Cobra Convertible 10th Anniversary
http://www.fquick.com/slow-v6
Local car cruise schedule..
http://www.cliffscalendar.com/
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