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The first thing you will need to do is remove the timing chain cover and the valve covers and see what is out of time.. Do you know if the timing is exactly as the picture I attached?
If you have #1 @ TDC and the balancer isn't lined up with TDC then yes you will need to tear it down and get it back right.. But being this it's out of time you may have bent valves since you have tried to start it, so get it back in time then do a compression check before putting it all back together so if it's 0 psi you won't have to tear it apart again..
If your not sure on how to install the timing chains then I attached the directions:
CAUTION: Overtightening the tensioner arm torx® bolt can cause severe damage to the cylinder head. Tighten torx® bolt to specified torque only.
NOTE: The silver bolts retain the guides to the cylinder heads and the black bolts retain the guides to the engine block.
NOTE: It will be necessary to slightly rotate camshafts for sprocket installation.
CAUTION: Remove excess oil from the camshaft sprocket bolt. Failure to do so can result in over-torque of bolt resulting in bolt failure.
CAUTION: Ensure the plate between the left secondary chain tensioner and block is correctly installed.
NOTE: Left and right secondary chain tensioners are not common.
CAUTION: After pulling locking pins out of each tensioner, DO NOT manually extend the tensioner(s) ratchet. Doing so will over tension the chains, resulting in noise and/or high timing chain loads.
NOTE: Before installing threaded plug in right cylinder head, the plug must be coated with sealant to prevent leaks.
You will need to verify the idler/crank(Primary) are lined up correctly... Then once the primary chain is set then set the plated links on the idler thru the holes then allign the camshaft. Then install the tensioners and you can recheck all lines.. Since it's a timing chain engine there is no need to spin it until it lines up to check..
Glad I could help,