P0340 help

[Danny_svt_99]

Can't get my car to run I changed the synconizer sounds like it is out of time, is it possible for the timing chain to have jumped a tooth and and run out of time? I've tried multiple things sounds like it has valve train nose on drivers side head cyl 4-6 but the push rods spun freely and all in all the heads were really clean but I just can't get a handle on what's going on I'm kinda thinking it jumped time cause I can get it to run for a couple of seconds but it's rough. I wanted to try to put a borescope through the synconizers mount hole and see if there was any noticeable scratching on the inside of the cover or a broken tensioner. Any help is much appreciated

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