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Mild Modifications / Which Vacuum secondary spring are you running on 4053-DZ 780
« on: May 12, 2022, 03:47:58 PM »
Which Holley Vacuum secondary spring are you running for the 1969 z28 Holley 780 4053 with the standard duntov speced cam.
Looking to have the secondaries fully opened sooner than 5600 rpms under load
thanks in advance
W
Looking to have the secondaries fully opened sooner than 5600 rpms under load
thanks in advance
W