Tremec T56 2nd Speed Gear, 2.66 Low Gear, 94-2002 Camaro/Firebird, A28 on the T56 Transmission Disassembled View.

Tremec T56 Countershaft (Cluster Gear).  Fits 93-94 LT1 T56 with 3.36 first gear ratio.  C18 on the T56 Transmission Disassembled View  

Tremec T56 Reverse Idler Gear.  #C21 on the T56 Transmission Disassembled View  

Tremec T56 Countershaft (Cluster Gear).  Fits 94+ LT1 & LS1 Camaro & Firebird, 03-04 Cobra, early Viper (this is a 2pc design) and Corvette T56 Transmissions (with 2.66 first gear ratio.)  C18 on the T56 Transmission Disassembled...

Tremec T56 Mainshaft Reverse Gear,  35 teeth. #A9 on the T56 Transmission Disassembled View  

Tremec T56 5th/6th Driven Gear, also popularly known as the 5-6 Gear Cluster, 37 & 29 Teeth (2.66 Low), verify your application. 93-94 F-Body T56 had a 36 & 31 Teeth (3.36/2.97 Low), it is item# 1386-070-001.  #A16 on the T56 Transmission...

Tremec T56 3rd Speed Gear for F-Body, Viper & Cobra T56 Transmissions. 37 teeth. #A31 on the T56 Transmission Disassembled View.