There are / have been two types of Tenere / XT / TT engines. The ones with kickstart and the ones with E-start. The E-start variant is wider, so if you have a kickstart frame, a straight fit it will not be.
Then, you will need to add the starting circuit: larger battery, switches, etc. Not easy to find room for the larger battery.
The oil tank you should keep; all XT engine have dry sump, so need some kind of reservoir. In the newer XT models it is located in the front frame tube.
So, bad news. Find someone who wants a kickstart only and swap for his E-start?