Can you turn it over by hand? If not then pull the plugs and try again. If you can't turn it over with a wrench without the plugs in it then something is very wrong. Most likely used long bolts in the flex plate or something like that.
Its super hard to turn with plugs out in but with plugs in its crazy hard-but will turn over when crank but like i have a low battery
I pulled the fly wheel bolts they seem to be fine
When im cranking it does not have a knock or clunking sounds like its toast- but did find my plugs had fuel from my carb that was leaking
I dumped all of the oil out and cranked with the plugs out to blow any out of the chamber
