Cheers Alan and Stormin from what i have and the photos I have managed to find out it a Colchester Master on one of the pictures I can just make out the Master name on the top of the plate,
Based on that it should be 6.5" with a 36 inch between centers, been busy today got out trailer together with our equipment we might need. I am getting exited now one more sleep and an early 4am start ha ha bit like Christmas.
Will let you know how we get on when we get back tomorrow.
Till then cheers
Jordon