Probably timing chain tensioner. I have changed several of them. Loud ticking (slapping) from front of engine. Most magnums I have changed them on had 100k or better and the chain was streched rite out as well. Id almost bet $ that is your noise.
this is a 91 block and doesn't have the timming chain tensioner, sounds is exactly like a losse belt squeal, no ticks or any other noises, I tried recording the noise with my I phone but it really picks up los of background , maybe ill try again and post it
