My 95 suburban has 272k miles on it, original motor. I don't see any reason yet for it not making it as far as that one has. It is still as strong as when I bought it, and I have put 140k miles on it. The original transmission let go around the 230 mark...
I said all of that just to say, nice find and keep the up dates coming, and I too am glad you ditched the tail lights!
