The "Indestructible" Slant 6

Why did the piston have to be installed installed by a
reputable machine shop.
I myself have installed piston and pins in my
shop at home.
Not everybody has a small furnace at their disposal.
I've installed many with a torch.
I've ever seen our NAPA turns the rod area red when they install.

Yeah but you know when to lay off the hot wrench too.