1977 Checker Marathon Ignition Boxes & Controllers
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- Holley®EFI™ Crank Trigger KitChecker Marathon 5.0L / 5.7L 1977, EFI™ Crank Trigger Kit by Holley®. Holley's EFI Crank Trigger Kit is engineered to provide an accurate crank speed & position signal to Holley EFI systems in the most-demanding, high horsepower,...Crank wheel centers off of the balancer’s hub, eliminating the need for a centering ringAll billet, 6061-T6 aluminum sensor mounting brackets with “bright-dipped" black anodized finish & Laser etched Holley EFI logo$559.95
1977 Checker Marathon Models