i just purchased a 83 380 sl, local mb indep shop said they could break any time. I was a vw mech. 25 years ago, looked at sprokits and they look new. so does the chain. car has 155k. single origonal sprokits. should i worry or. he quoted me about 3k to change to double, I am thinking I would kjust get a mnotor out of a wreck if chain breaks,?? any thoughts on this. otherwise motor seems good. thanks Boatr@cchat.com