DD15 major overhaul, how to setup the gear train timing and what tools you will need

Make sure you have enough experience or have someone with enough experience to help you with this process. It can be very easy to make a mistake which can lead to catastrophic engine failure.
Quick overview on how to setup the gear train timing on your DD15 and what tools you need. It is very important that you have these tools, the first tool is the crankshaft TDC locating tool.
PART Number J-48630
This will help you secure the crankshaft in the TDC position, then you can start to setup the Number 3 idler gear but you MUST have the Cantilever Tool.
PART Number J-47487
The Cantilever tool allows you to set the correct lash or clearance between the Number 3 idler gear and the Number 2 idler gear.
I hope this helps illustrate what it looks like before you and after.