Can this be duplicated with a 5.9 build??

OP said 310 HP and 450 TQ.

That's pretty close to the stock 5.9 @ 245 and 330, and should be relatively "easy".

Here's one (310 and 400) already built for $2500-

JEGS 3601: Chrysler Magnum 360 ci Performance Crate Engine [310 HP/ 400 FT.-LBS.] - JEGS High Performance

9.1:1 compression