~450hp from stock stroke 340?

The 380hp crate engine makes 400 hp with similar cam and stock magnum heads, don't sound like 450 hp with Trick Flow is that much of s stretch. What's the cr gonna be ?

Here's a 450 hp stock short block 5.9l with edelbrock heads and similar cam.

https://www.motortrend.com/articles/hrdp-0804-small-block-mopar-engine/
Test NotesBase:Production Mopar 5.9 Magnum long-block with passenger-car oil pan, MSD distributor, Mopar M1 Magnum dual-plane intake, 750 Speed Demon carb, 1-inch open carb spacer, 13/4-inch Hooker Super Comp Headers, LA-series engine timing cover

Modified:Add: Comp XFI hydraulic roller cam lobes 3016/3037, Comp pushrods Comp aluminum rockers, Edelbrock Performer RPM Heads, Mopar M1 single-plane intake

230/236-degree duration at 0.050 Comp custom grind on a 110-degree lobe separation, using Comp's XFI hydraulic roller lobes No. 3016 and No. 3037 on the intake and exhaust,

Dyno ResultsMopar Magnum 360SuperFlow 901 engine dynoSTP correction factorTested at Westech Performance Group