Stage V's are not cheap..but as the saying goes "you get what you pay for" I believe one of the main header manufacturers is making headers for the raised port Stage V's

One needs to keep in mind that when these heads were made original Hemi blocks were big money and hard to find. 440 blocks were cheap and plentiful.
The 440 block treatment consists of drilling and tapping for larger bolts/studs on the main and some on the deck.Clearance for pushrods and drilling out the pickup and some of the oil galleries.
Cheers,Pat