holley Holley Wiring Harness EFI Main Harness Chevy Pontiac Kit 558-102 Posted on January 4, 2024 by admin Wiring Harness, EFI, Main Harness, Holley HP, Dominator, Chevy, Pontiac, Kit. Thank you, Summit Racing Equipment. The World’s Speed Shop Since 1968. 558-102 chevy harness holley main pontiac wiring