You might consider having fuel rails put on your current manifold and run two 4 barrel throttle bodies. You would have port injection and dual throttle bodies. I run a setup like this but on an old Holley Pro Dominator tunnel ram. I think that would get you the best performance, I do not know how it would work out from a money standpoint. In 2017 it cost me $450 to have my intake modified for fuel injectors and -8 fuel rails.