2016 international w/ isx 12 oil leak

[cooter]

so im finding all my 2016 and 17 cummins equipped internationals are leaking from the back of the timing gear housing. also from the high pressure pump gasket. now i have replaced these on smaller and older cummins before and know that the cam must removed for the removal of the gear housing is this the same with these isx12s and 15s. and how much of a pain is it to do. and last what time frame should i shoot for the truck being down being this is the first time i will attempt this repair?