Spotter's Guide Hood Bird Guide Color Guide

1970 Firebird Engines

                    Engine ID Stamping  
UPC Code Type Source Displacement (cubic Inches) Bore & Stroke Carb Comp HP/RPM Torque/RPM VIN Manual Automatic Usage
L-22 Inline 6 Chevrolet 250 3.88 x 3.53 1 bbl 8.5:1 155@4200 235@1600 n/a ZB ZG standard Base
L30 V-8 Pontiac 350 3.88 x 3.75 2 bbl 8.8:1 255@4600 355@2800 n/a WU YU standard Esprit, optional Base
L65 V-8 Pontiac 400 4.12 x 3.75 2 bbl 8.8:1 265@4600 397@2400 n/a - XX optional Esprit
L78 V-8 Pontiac 400 4.12 x 3.75 4 bbl 10.25:1 330@4800 430@3000 n/a WT YS standard Formula 400
L74 V-8 Pontiac 400 Ram Air III 4.12 x 3.75 4 bbl 10.5:1 335@5000 430@3400 n/a WS YZ standard Trans Am, optional Formula
L67 V-8 Pontiac 400 Ram Air IV 4.12 x 3.75 4 bbl 10.75:1 345@5400 430@3700 n/a WH XN optional Trans AM