could be your axels. i would also suggest getting some motor mounts, that 6puck will destroy them on hard launches. my boy had a 6puck clutch in his 91 integ and all his motor mounts where gone after a short time  . as for breaking it in i would say 500 miles
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3DIMENSIONZ
[IMG]http://img.photobucket.com/albums/v518/707nismo/Picture_0114.jpg[/IMG
94 Sentra Se-r....JDM SR20de, I/H/E, 17* timing, 8mm magwires, FSTB, RSTB, Tsuru HL's, B14 SE-R rims, 626 mazda lip, cf hood
138whp, 128lbft tq :D 8/24/03 DnR Performance
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