These Performer RPM cylinder heads are designed for 400, 430 and 455 c.i.d. Buick engines. These heads include adjustable rocker stud and guide plate set-up for use with small-block Chevy style adjustable 1.6:1 ratio rockers.
Edelbrock Performer RPM Buick; complete
Buick:Big-Block:400 (6.6L)/430 (7.0L)/455 (7.5L)