no... 5.4 is modular

stroke and bore only increases internal combustion chamber ci

a 331 is still a pidly **** motor

12:1 would an n/a compression, you would want 8:5:1 or 9:1 or so for boost

destroking is the same cost as stroking... the stroke is basically determined by your rods/crank, Bore increases your cost exponentially, boring is not worth it on these motors, hence the 5.4 is the best way to go because it costs less per cube. (all you need is replacement forged internals)

You obviously have no idea what your talking about (no offense) you need to really know what your doing before your buy anything or this project will result in nothing but headaches and a empty bank account