99' izuzu trooper

how to lineup the cam's to put on timing chain,so engine will crank?

If you have the 3.5 V6, replacing the timing belt is tricky and way to much to go into here. A Factory Service Manual will help, or AllData or Mitchell online.

Check this http://forum.planetisuzoo.com/viewtopic.php?t=16972

It discusses both DOHC & SOHC engines - be aware of the differences.