EFI Crank Trigger Kit - 556-113 no-abs 7L V8 350 CID See

7L V8 350 CID See Below

1975-1978 GMC K15 400 CID

Opening Vacuum 10

Glasspack mufflers may be used with slight modifications

1973-1974 GMC C15/C1500 Suburban 250 CID

EFI Crank Trigger Kit - 556-113 no-abs 7L V8 350 CID SeeOverview: 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, racing applications. Crank position is measured every 10 degrees as opposed to every 45 degrees for a standard 4 Magnet, MSD "style" Crank trigger. It is designed for use on early model BBC Chevy applications using a standard ATI or Fluidamper "style" balancer up to 7 1 4" in