How Much Damage could possibly occur..............

I would say heads, block, cam, crank = shot. Every motor I blew up had a hole or crack in the block, a broken cam, broken rods, broken pistons and most had a cracked or broken crank. All the motors I blew up were gm, so they were probably made out of pot metal anyway. I takes a little more care of my Mopars. My friend drove 10 miles with a thrown rod on his 318, we made it home.. It was fun riding shotgun watching smoke roll out the hood and tail pipes.
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