273 to 383 Formula S Barracuda

Would the Borgeson box work with the 67 big block K? Does the formula S package make the 273 an HP?
I like the 383 idea but understand the dilemma.
If it was a 2 barrel 273 I would go 360 or 383 for sure.
I see aftermarket power steering packages that say they work with 67 BB A body's but I am consulting this group for some insight. Yes the 273 is a HP 4 barrel.