If there's a chance the chain jumped, you may have damaged valves, [contacted a piston]. I would pull all the plugs and turn it by hand to check/feel if there's an interference problem. However, If you've done a compression test the damage is already done.
Pull the left valve cover and see where the timing mark is [before TDC] after the intake valve on cylinder #1 closes.

Many moons ago when I worked as an auto mech, we had a guy come in with a truck with a SBC that wouldn't start. We all thought is was a broken timing chain. The owner was shocked when we only charged $35 for the repair. Turns out it was a carbon track in the distributor. We R&R'd the cap & rotor and it fired right up..