Moroso Quick Fastener Spring - 1 3/8" Spring; Spring Height: .325" - (10 Pack) SP600BK Our unique two-piece design fits

Our unique two-piece design fits all big block and small block Chevrolet and Ford engines

1979-1980 Chevrolet K10

Boost Reference Controlled

Replaces fan clutch

Moroso Quick Fastener Spring - 1 3/8" Spring; Spring Height: .325" - (10 Pack) SP600BK Our unique two-piece design fitsDesigned for use with Moroso's flat, oval head and butterfly fasteners 10 per package Determine "C" total thickness of panels being joined (including space in between, if any) Select the appropriate body length "A" and spring height "B" combination to provide the desired thickness range NOTE: Click on image for diagram to assist in choosing the correct spring and fastener combination. Moroso Performance Products is one of the worlds most respected