V9 CORVETTE ENGINE SERIES NUMBER AND SUFFIX CHART Cont 1968 427 8 CYLINDER Tvnv Tv Description Designation Description Designation High Performance 4 IL Special High Performance Tri Carb IH High Performance anrf Tri CarI IM Heavy Duty 4 IT High Performant e Tri Carb and 3 Soeerl Special High Performance Tri Carb Automatic Trans i IO and Aluminum Heatls IU 3 S eetl Automatic Trans I0 19S9 350 8 CYLINDER High Performance HW Manual Trans HY High Performance C A C HX 3Speed Automatic Trans T H 400 HZ 427 8 CYLINDER H gh Performance 3Speed Tri Carb Special High Performance Automatic Trans T I I 400 LL Heavy Duty Clutch LT High Performance LM Aluminum Heads Heavy Duty Clutch LU Tri Carb High Performance 3 Sneetl Heavy Duty 3 Speed Automatic Automatic Truns T H 100 LN Trans T H 400 LV Heavy Duty LO Aluminum Heads 3 Speed Automatic Alurrtinum Heads LP Trans T H 400 LIN Tri Carb High Performance LO Trr Carb Special Hieh Performance I ri Carb Special High Performance r LR 3Speed ftutcmatic Trans T H GOD r LX 1970 350 S CYLINDER Manual Trans CTL Hicfe Performance Transistor Ignition C A C CTO 3Sr eetIAu1omatic T H 400 CTM Special High Performance CTR II gh Performance I CTN Special High Performance Transistor Ignition CTU High Performance C A C CTO Special High Performance Translator Ignition High Performance Transistor Ignition CTP 4 Speed i CTV 454 8 CYLINDER High Performance 4 BBL 3 oeed 4 BBL Heavy Duty 3 Speed Automatic Automatic T H 400 CGW T H 400 CZN High Performance 4 BBL CZU High Performance 4 BBL Transistor 4 BBL Heavy Duty CZI Ingition CRI WAREHOUSING AND DISTRIBUTION DIVISION UF GENERAL MOTORS CORPCRAT ON CHEVROLET I4A REV 12 83 13 y A I 4