Car is a 1978 Pontiac Trans Am with a Pontiac 455 under the hood. Engine overheated and blew a headgasket. Here I swap the factory iron 4X heads for Edlebrock 87cc performers. I still don't know why it overheated, I suppose I won't know for sure that I've fixed it until the summer heat comes around.

Links:
Vice Grip Garage BBC v8 rebuild video. Pushrod length segment at about 14minutes in.
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Fast Monty’s Garage on electric cooling fans .
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Heads and accessories from Butler Performance