3.9 petrol Classic Range Rover 90 there was a sound like the exhaust is leaking.
But then I found blown one of the Head gasket is failure, I opened the one head cylinder did the facing polish for it and about to fix I thought of the other one is good to open and replace the gasket as well. Fix the both with new gasket and fix every thin back in position.
The drama is Engine fail to start up. I have checked the ignition spark and tried many things like new spark plugs, coil, distributor and ,fuel pump and filter, fuel presser are ok but the Engine still failure to start.

Please your advice.