Does this guy know what he's talking about?

I've got a 74 duster with a slant 6 in it, have thought a lot about building the 6 just for the uniqueness of it, too old to go racing, and not too worried about speed, just want it to sound like a beast. Something like this


But that's down the road a bit, but it has me thinking if I should keep an eye out for a 170 or a newer 225 to build instead of the one I currently have

I'm not anyways near a race car engine builder, and what he said made a lot of sense, but when he said to put the pistons in backwards to change the connecting rod geometry, while making sense, also freaked me out a bit
40 years ago(when I cared about racing and speed) an old man in the neighborhood used to swear by them, built them, and consistently won at the local strip(and had a garage full of parts) but he's long gone now unfortunatly
Looking forward to seeing what Tony does with his