SPECS AT A GLANCE
'70 LT-1 vs. '96 LT1
'70 LT-1 '96 LT1
Displacement 350 ci 350 ci
Rated Output-HP 370 hp at 6,000 rpm 300 hp at 5,000 rpm
Rated Output-TQ 380 lb-ft at 4,000 rpm 340 lb-ft at 4,000 rpm
Bore/Stroke 4.00/3.48 4.00/3.50
Compression 11.0:1 10.4:1
Two-/Four-BoltBlock Four Four
Crank Forged Cast
Rod Length 5.70 5.70
Rods Forged PM
Rod Ratio 1.637:1 1.637:1
Head Casting No. 492/414 372
Chamber Volume 61-64cc 54cc
Valve Sizes 2.02/1.60 1.94/1.50
Peak Flow Rates (in./ex.) 207/146 218/173
Screw-In Studs Yes No
Guide Plates Yes No
Cam Type Solid Hydraulic
Cam Lift 0.459/0.485 0.450/0.460
Cam Duration 242/254 202/207
Cam Lobe Separation 116 116
Intake Manifold Dual-Plane LTI EFI
Aluminum/Iron Aluminum Aluminum
Carb/TB Holley 3310 4V Dual 48mm
Carb/TB Rating 780 cfm 630 cfm
Tested Output-HP 353 hp at 5,600 rpm 351 hp at 5,700 rpm
Tested Output-TQ 392 lb-ft at 4,100 rpm 379 lb-ft at 3,900 rpm