First drive after brake upgrade, then - BANG!

Been looking all morning for obvious signs of trauma but I don't see anything out of the ordinary, except for the height of the car. Next move will to be to get it up on a lift to look more closely.
guy said the power steering didn't work, cause the pulley was bent (no belt) - since then, I found out the wrong brackets are on it, and it's a big block pump (on a small block). Also, the starter had only one loose bolt holding it on. It'll take time, I know - but I am going thru it - even more carefully, now.

While I was at it... WTF?

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There's your "Bang" the motor's not bolted down, I wouldn't be surprised if the hood and air cleaner weren't dented,

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