cummins 6BT into a land rover i have seen this on youtube in a hicap 110?

but how do it fit and ok on a tractor or lorry they are powerful beast's but very low in gearing due to obvious parting, is this a good fit and can anybody get me the info i need to fit this in my 110 exarmed forces?

seems fast and nice too. type in on youtube land rover cummins 6bt. a have a towl or tissue at the ready, haaaaaaaa