I recall all the fuelie 327's were 4-bolt...and yes, the big-truck motors were. (IIRC, they also had steel cranks & forged rods.)
However: the "large jernal" 327 is the same as a 350 block...which is quite possibly what it is.
That image is one of the stupidest things ever seen on the Internet. My old boss got a laugh out of it. Yeah, he's a real loser with tattoos on both forearms...I guess they clash with his Airborne wings, or maybe his Silver Star.