This difference in flywheel diameters requires two distinct starter housings. Starter noses used with large-diameter flywheels have two offset bolt holes, while starters for small flywheels have two bolt holes that are parallel to the back of the block. Most Chevy blocks are drilled for both types...
OE NO. PWM-9612, 9612 Other attributes Place of Origin Fujian, China Type Starter Assembly Model Number 3010-161 Brand Name SEALINK Warranty 12 Months Car Make Chevy big block Mark Certification ROHS/CE Exporting Certificate CO,Form E,Form A,Form F, etc ...