CM870 Front timing structure/Exhaust manifold/Oil Pan

[BigIce75]

Hello, I have a 2005 International 9200I with a cm870 ESN 79093067 /CPL 8520. Engine has developed a number of oil leaks.
1. Front timing structure leak
2. Oil pan.
I'm currently trying to gather up a parts/Special tools list to do this job, looking to know what i should be replacing while i am doing this job. Any advice would be appreciated.
I also have developed an exhaust manifold leak, i would like to replace it i am not sure if i should stay vgt or put a t6 style turbo on it? Also what brand of exhaust manifold/turbo do you recommend? thank you