This listing is for a brand new set of long slot style rocker arms that are made in the USA by Elgin Industries. Set comes with 16 rockers, 16 grooved style pivot balls and 16 lock nuts.

The rockers are the long slot design needed for increased lift cams and fit the following big block V8 engines in Chevrolet and GMC passenger cars and trucks.

• 366 CID (6.0L) 1966-1990
• 396 CID (6.5L) 1966-1970
• 402 CID (6.6L) 1970-1972
• 427 CID (7.0L) 1966-1990
• 454 CID (7.4L) 1973-1990

Rocker Specifications:

• Part Number: RK507
• Ratio: Stock 1.72
• Stud Size: Stock 7/16"
• Style: Stamped Steel Long Slot