in my project ive used the V8 disco auto box with the 300tdi bell housing, 606 is running a manual/mechanical fuel pump with 6mm inserts so just up on standard power but everything eles is as it come out the donner car,i would of liked to use a manual box (r380) as the are 2 to a penny to pick up and cheap as chips if the do go bang, i dont think the out/input shafts are long enough to mate up with the 606 flywheel without a lot of work to get a clucth plate/flywheel as mb done very few manual 606td's unlike the easier auto option (spacer/flexplate) please dont start ranting raving if im wrong if it can be done im happy to take mine apart and look at it again for a manual box, mines altogether but im yet to try/drive it as its only in the mock up stage and need to get some props made