Chieftain Mk.8 after completing all phases of "Totem Pole". Later upgraded with Stillbrew, 1984–86 Chieftain Mk.12 Chieftain Mk.5 after completing all phases of "Totem Pole". Later upgraded with Stillbrew, 1984–86 Chieftain Mk.12/13 Proposed further upgrades, cancelled when the Challenger 1 was introduced. Chieftain 800 Re-engined Iranian FV4030/1 Chieftain Mark 5/3P fitted with the Rolls-Royce CV8 TCA engine and the fully automatic TN12 Mk. 5 transmission. Chieftain 900 Two Mk. 5/3 (P) were converted by Royal Ordnance Factories by fitting the Rolls-Royce Condor 900E engine and the fully automatic TN12-1000 version of the Chieftain's gearbox, hence the name of Chieftain 900. The two Chieftain 900 prototypes were built in April 1982 and were exhibited the same year at the British Army Equipment Exhibition (BAEE). They were not fitted with real Chobham armour but were mocked up with cosmetic sheet-metal cladding to simulate the Chobham armour package. The project was abandoned by 1986. FV4030/1 Chieftain Mk. 5/3 (P) « Persia » Also known as "Project 4030 Phase 1" or "Improved Chieftain". The Mk. 5/3P featured the Tank Laser Sight (TLS), the Muzzle Reference System (MRS), a fully automatic controller for the TN12 gearbox, a fuel capacity increase, thickened underbelly mine armour and shock absorbers fitted to the front and rear suspension units. 185 vehicles were built between August 1976 and late 1977/early 1978. FV4030/2 Shir (Lion) 1 Also known as "4030 Phase 2". This tank formed Phase 2 of the Iranian contract for the supply of a new generation of MBTs (Phase 1 being for an Improved Chieftain). This project began in 1974. Shir 1 incorporated the Chieftain hull front and turret casting. The rear of the hull was reconfigured to accept a new power pack comprising Rolls-Royce CV12 (a turbocharged V12 four-stroke diesel engine), David Brown TN37 transmission and new cooling group. An improved bogie suspension (Super Horstmann), new final drives and tracks were included. The first vehicle-ran in April 1977 and no production deliveries had taken place when the project was cancelled in February 1979. Khalid Also known as "4030 Phase 2 Jordan". The sale of 274 MBTs was negotiated with Jordan in June 1979 following the cancellation of the Iranian contract. The Khalid tank is based on the Shir 1 design with the addition of the Integrated Fire Control System (IFCS), Tank Laser Sight (TLS) and the No 84 Day/Night Sight. The first 125 were reworked Shir 1's and