This is hopefully tomorrows job, will have somebody there with me to suffocate the engine in cass of run away, i did also check for air in the system and the fuelfilter appears to be very pressurised with air so will be giving it a good bleed aswell just to be sure its not air locked somewhere.
I did also notice today that one of the return pipes has basically completely rotted away, would this affect starting or will it be alright just potential for diesel spill?
Thankyou all for all the help