CORVETTE ENGINE SERIES NUMBER AND SUFFIX CHART Cont 1965 396 8 CYLINDER Tvau Tvrw Description Designation Description Designation Spoc4 High Performance 4 IF Note Engines are stamped with a source production date and type on serial pad 1966 327 8 CYLINDER Manual Trans HE Fowerglide 4 HO A4I R HH Special Hlgla Performance 4 4 HT A I R and Powerglide 4 HH Power Steering r HP Special High Performance and A4I R4 4 4 HD Special Hiya Performance C A C and A I R KH 427 8 CYLINDER Special Hiya Performance Hyd4 Lifters 4 4 4 IK Special High Performance 44 4 4 IP High Performance IL Powergllde 4 ICI A l R 44 4 4 4 4 IM Powerglide and A4I R 4 4 IR Type Designations for soma engines wlll he followed by an R Rochester or H Holly Carter to designate Carburetor requiremenas 1967 327 B CYLINDER Manual Trans 4 4 HE Powergllde 4 4 4 4 H0 A I R 4 4 4 HH Special High Performance 4 HT A l R and Pcvwergllde 4 4 HR Power Steerlng Special Hiya Performance and C A C HP Special High Performance and A l R 4 4 HD Special High Performance CaA C and A l R KH 427 8 CYLINDER 4 Speed or Ppwarglide 4 4 IL A I R and Aluminum Heads 4 4 4 44 JH Trl Carb 4 JC Powergllde 4 4 4 4 4 ICI Special High Performance and Tri Carb 44 4 JE Powergllde and Tri Carb 44 4 44 4 JD Heavy Duty 4 44 4 IT A l R4 and Powerglide 4 4 IR Aluminum Heads 44 4 4 IU A l R Pwuerglide and Tri Carb 4 4 4 4 JG A R 4 4 4 4 4 4 IM A l R Special Hiya Performance and A I 4R and Tri Carb 4 4 4 4 JF Trl Carb 4 4 44 4 4 JA 1Q68 3Z7 8 CYLINDER Manual Trans 4 HE Hyd4 Steering and C A C 4 4 HP 3Speed Automatic Trans 4 r H0 Special High Performance HT GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVRDLET 14 12