400 hp 5.2l vs 5.9l Magnums

Surprisingly similar builds making 400-409 hp just where you want your hp to peak 5400-5600 rpm or 5900-6200 rpm.
Geared right you would have a strong runner either way.

5.2l Magnum heads
Mopar 318 Engine - Car Craft Magazine

5.9l 380hp create, Magnum heads
360 Crate Engine Buildup & Dyno - Mopar Muscle Magazine

5.2l EQ heads
Chrysler 318 Engine - Popular Hot Rodding Magazine
5.9l EQ heads
5.9L Magnum Engine - Make Mine A 5.9


Bonus 400 hp 318 build ported 302 heads
318 Small Block Build - How To - Hot Rod Magazine