Getrag conversion in a short wheel base XKE

Hi Guys,
Has anyone successfully fitted a Gertag 265/6 transmission in a Series 1 Coupe?
I am about to replace the engine frames on my 67 Coupe and figured this is about the best opportunity to fit a 5 speed transmission. About a year ago, I installed a Getrag 265/6 in my 250SL Pagoda and I just love it. I have another one just waiting to go in the E Type, if it is at all possible, without butchering the car.
Your advice will be much appreciated.
Regards
Chris