1994 Chevy Blazer Timing Question

Hi,

I was driving my 1994 Chevy Blazer the other day and the timing chain broke. A lot of people have told me that it will need new heads cause it bent the valves.

My question is what do you think? I was going about 40 to 50 mph went it broke and it has the 4.3 Vortec engine.

Thanks and I'm very grateful.