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7 Ratio With 5/16 Inch Stud
and valves
along with an electronic control unit box
yet durable way to change out the springs with heads on the engine
Distributor Vacuum Advance Lockout For GM HEI Dist. Replaces Vac. Adv. Chamber Proform Engine Valve Spring Checker 7 Ratio With 5/16 InchEngine Distributor Vacuum Advance Lockout. Fits GM HEI Models 1996 and Earlier With Clockwise Rotation. Replaces Vacuum Advance Chamber. Made From High Quality Plastic Material. Features a Black Finish. No Modifications Required For Install. Sold individually. Product Details: Engine Distributor Vacuum Advance Lockout Fits GM HEI Models 1996 And Earlier With Clockwise Rotation Replaces Vacuum Advance Chamber Made From High Quality Plastic Material
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