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Hey guys new here! Just recently built a ls1 with ms4 cam,long tubes, ls7 lifters, stall, ls6 intake, 7.400 pushrods and PRC 2.5 heads. On startup car sounds fine. Rather running it for awhile sounds like valve train chatter but came let it cool off and sounds fine again. Anyone ran into this problem? Couple guys say fly cut pistons? Don’t really want to tear it back down
11-27-2020, 11:54 PM
Ls1 PRC 2.5 Heads MS4 CAM 
