Competition Cams 19021-1 Features: Most Advanced Aluminum Rocker Arms Ever Offered Modern Design Features CNC-Machined Lightweight Design Unrivaled Quality And Ratio Accuracy American Made Quality Buy Them Once And Use Them Forever Lifetime Warranty Height: 2.00 Width: 3.75 Length: 6.50 Weight: 0.44 lbs Fitment: 1989/GMC/V3500/Sierra Classic Standard Cab Pickup 2-Door/7.4L 454Cu. In. V8 GAS OHV Naturally Aspirated::N/AReauires Stud PN[4514-16] To Replace Late Model Pedestal^^1989/GMC/V3500/Sierra Classic Crew Cab Pickup 4-Door/7.4L 454Cu. In. V8 GAS OHV Naturally Aspirated::N/AReauires Stud PN[4514-16] To Replace Late Model Pedestal^^1989/GMC/V3500/Sierra Classic Cab & Chassis 4-Door/7.4L 454Cu. In. V8 GAS OHV Naturally Aspirated::N/AReauires Stud PN[4514-16] To Replace Late Model Pedestal^^1989/GMC/V3500/Sierra Classic Cab & Chassis...