Swap 340 for magnum 360

I would not swap, 340 has lots of potential for up grades and are very desired in 340 cars with 400 hp on tap with good bolt on parts

Granted I don't know the OP, but I *think* he might have that in mind...use the 5.9 to have some fun and build the 340 for later...?

EDIT: Besides, a 5.9 has lots of potential too. They'll respond favorably to purposeful and well thought out mods just like any engine.