This listing is for a brand new set of (16) hardened pushrods, rocker arm studs, New Lifters and Flat guide plates kit from Elgin Industries. Kit includes 16 pushrods, 8 guide plates 16 Valve lifters and 16 rocker arm studs. The guide plates are the flat style for 5/16" diameter push rods. The rocker arm studs are the screw in style with shouldered heads for guide plates and fit 3/8" rocker arms. The push rods are 5/16" stock diameter in 7.800" stock length and are hardened for guide plate use. This kit is compatible replacements for many small block Chevy 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400 V8 engines from 1955-1986 in passenger cars and 1955-1996 in truck engines. Pushrods Overall length: 7.800" End Style: 5/16" Ball Ends Diameter: 5/16" x 0.075" Wall Material: Hardened 1010 Steel Guide Plates Stud Hole Size: 7/16" Push Rod Slot Size: 5/16" Rocker Studs Material: 190,000 PSI Alloy Steel 2.425" Overall stud length 1.725" Stud height Top 3/8"-24 Fine thread Bottom 7/16"-14 Coarse thread. Part# GP100K + HL1817S x 16 + PR537S x 16 + RDS-2920-16 x 16