Proform Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 414 66825 1981-gmc-k1500-esi9569435 Can be used in carbureted

Can be used in carbureted or EFI applications

EZ Mount packages the manifold and upgraded

Integral Reservoir Master cylinder in a ¾ bore and universal pull type slave cylinder in a convenient kit

100% TIG-Welded for Strength and Durability

Proform Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 414 66825 1981-gmc-k1500-esi9569435 Can be used in carburetedPROFORM Wedge Locking Header Bolts ELIMINATE the need to constantly re tighten collector bolts, and without the need for clips, pins, racing wire, chemicals or gunk. The secret is in the Wedge Locking Washer's super hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge locking action that uses tension, instead of friction to stay