HyperSpark Ignition Adapter - 558-323 holley This includes your Master cylinder

This includes your Master cylinder lines

5L V8 273 CID See Fitment Notes Above 1967-1974 Dodge Coronet 5

4L V8 1979 - 1991 GMC C3500 454/7

Includes 4 Plates and 8 Screws

Pre-Made Cross-Over Tube Provide Optimal Fit & Ground Clearance

HyperSpark Ignition Adapter - 558-323 holley This includes your Master cylinderOverview: Designed to plug and play with HyperSpark distributors and Holley EFI main harnesses with an ignition connector, such as part number 558 104. Features: Allows customer to run a "timed sequential" fuel strategy Application: Year Make Model Submodel Engine Size Universal Specs: Brand Holley EFI Emission Code 3 Harness Application Universal Harness Type Ignition Product Type Ignition Harnesses