More sporting gear ratios

[STELLWAG P]

Dear Greg.
My Name is Peter Stellwag from München, and I am also a BOC member, since 2003.
As my old std. 400 gearbox has the same usual problems, I would like to go for the Ford box.
Can you, please tell me who has it in his 400? And, possibly, who can do that work needed, please?
I thank you very much for your efforts and help.
With best regards
Peter