i CORVETTE ENGINE SERIES NUMBER AND SUFFIX CHART Cont x J wsa 1 427 8 CYLINDER i J Type Type Dascrlptlon Designation Description Designation i High Performance IL Special High Performance Tri Carb IR I High Performance and Tri Carb 4 IM Heavy Duty 4 IT I High Performance Tri Carb and 3 Speed Special High Performance Trl Carb Automatic Trans r IO and Aluminum Heads IU i 3 Speed Automatic Trans I0 i r I 969 350 8 CYLINDER High Performance HW Manual Trans 4r HY 1 High Performance C A C r HX 3 Speed Automatic Trans T H 400 r HZ y 427 B CYLI ND E R High Performance 3 Speed Tri Carb Sp ecIa High Performance Automatic Trans T H 400 LL Heavy Duty Clutch LT High Performance LM Aluminum Heads Heavy Duty Clutch LU V Tri Carb Hiyi Performance 3 Speed Heavy Duty Baipeecl Automatic Automatic Trans T H 400 LN Trans T H 400 LV v Heavy Duty LO Aluminum Heads 3 Speed Automatic Aluminum Heads LP Trans T H 400 LW Tri Carb Hiya Performance LO TrI erb Special High Performance TrI Carb Special High Performance LR 3Speed Automatic Trans T H 400 LX I r v 970 i 350 S CYLINDER Manual Trans CTL High Performance Transistor Ignition C A C CTG i 3Speed Automatic T H 400 CTM Special High Performance CTR High Performance CTN Special Hlgh Performance Transistor Ignition CTU i I High Performance C A C CTO Special High Performance Transistor Ignition i High Performance Transistor Ignition CTP 4 peed CTV 454 8 CYLINDER I High Performance 4 BBL 3 Speecl 4 BBL Heavy Duty 3Speed Automatic I Automatic T H 400 CGW T H 400 CZN High Performance 4 BBL CZU High Performance 4 BE L Transistor i 4 BBL Heavy Duty CZL Ingition CRI l f x i L j V P 2 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 14 I Q I 3 I 5 I