It is also true that defensive ends could wack the O Linemen in the head. ALA Deacon Jones
Very much so.
It gets similarly weird at running back.
Jim Taylor would be a halfback in a modern offense. Not that he couldn't block, but in Lombardi's offense (and others) the fullback got the majority of the carries between the tackles. Just a position name change, but that's all. Possibly some minor questions if he'd be a 3-down back now (is he fast enough for the occasional toss/sweep? Can he pass block? Can he catch?), but he'd probably slide right in.
Paul Hornung as a triple threat halfback is harder to project to the modern offense--the position doesn't really exist anymore. He had blocking assignments when Taylor was doing the grunt work inside, so he's not a dainty little flower. But HBs of the era were smaller, speed players that ran routes, took pitch plays, and occasionally turned those toss plays into HB option plays (ergo 'triple threat.) If you insist on keeping him as a modern HB, he'd likely be a part time, 3rd down back.
The best use of him might be in the Shannahan/LeFleur offense as a better Swervin' Ervin. He'd be a legitimate thread to take jet motion and was a decent receiver. Anyone got time machine?