Can this be duplicated with a 5.9 build??

YY1 said

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

• Camshaft: Hydraulic roller
• Advertised Cam Duration: 251 Intake; 271 Exhaust
• Cam Duration @ .050 in.: 188 Intake; 194 Exhaust
• Cam Lift: .411 in. Intake; .418 in Exhaust

Click to expand...

I’ve eyeballed these packages before and I think there pretty good. It is a valve spring (if even needed) & cam swap away from a very nice mild performance engine or in this case, a tow engine.

IDK, perhaps something like a 210@050 intake duration?
It’s small enough not to need a converter change but effect the low end power a good bit.