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Old 01-04-2017, 11:47 AM   #142
MTCK
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Join Date: Dec 2009
Location: Fairbanks, AK
Posts: 1,830
Re: L29 454 Build for '63 K15 with NV4500

X2 on leaving the plenum on and removing the TB. What are you running for rockers and studs? Stock non adjustable stuff or something else? Do you hear anything resembling an exhaust leak any other time? I haven't had any coffee yet so let me think about this a little bit...
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1991 V3500 L29 454 4L80E NP205 D60/14 Bolt 4.56's
1984 K30 292 TH400 NP205 D60/14 Bolt 4.56's flat bed 7'6" Meyer Plow
2022 Silverado 3500 L8T
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