Vintage Cars: 67 440 tnt, dual snorkel air cleaner, barrel carbs

Question
what is the differance between 440 and tnt ,magnume not just hp but what makes the power cam heads? lift?

Answer
This is a little bit out of my league, but as I once had a '68 Imperial with a "440 Dual" package, I'll give it a shot.  I honestly don't think there's a big difference among any of the 440s internally.  The basic 440 had a single exhaust, you could then upgrade to the dual exhaust with dual-snorkel air cleaner, and of course the 440 Six-Pack with the three two-barrel carbs.  You should search the 'Net for Chrysler websites that have forums dedicated to the various Mopar engines for any more detail.