A very 'famous' piston.

Guess 'famous' might not be the right word ... historic could have been a better choice.

Yes, Dropped a valve in the lights ...
He said it was 'well worth it' and it was easy for me to agree with him.

It's a full thick skirt like a friggin diesel piston, weighs a 'ton'. 'Slug' is a good word for that. lol