I stopped by Chuck Lofgren's shop in Cedar MN and inquired about a slant six build and he showed NO interest at all. He won the Mopar Muscle Magazine 2005 Hemi build off. He does build wicked Mopar V8's though.
Probably doesn't know anything at all about the hp/ci capabilities of a turbo slant six.
He'd be amazed... LOL!
Apparently, none of 'em do... it's a too-well-kept secret...
That Moparmuscle article has you jumping through a multitude of hoops and spending cubic dollars to make 300 HP.... Tom Wolfe put a hairdryer and a 4bbl on his '70 Dart stock slant six with over 100.000 miles on it and made 300 hp with no other changes...