My 1994 Classic Range Rover on an ‘M’ plate is the very last factory fitted with 200TDI Land Rover Engine and manual gear box. It has now been diagnosed with a blown Head Gasket, (carried out the smoke test) best result is a new Head Gasket. Worst result is a cracked block. Million dollar question, can I drop any 200TDI engine (assuming it’s manual) into my Range Rover? Oh it’s factory fitted Air Con. Will a Discovery 200TDI donor engine drop straight in?