What Engine to go with

Hello everyone, I am new to the site. I bought a 74 Plymouth Duster 360. I am debating on a few different engine opitions, and i am in need of some advise. I am looking at going with either a Gen 3 Hemi engine, 383, or putting a 408 stroker kit on my 360. Does anyone have any options on these, are they good idea, bad idea, etc...... Maybe someone has another setup that is better than any of these. I want a engine capable of 400whp+ with a decent top end(for the occasional highway run). Any advise is good advise! Thanks Everyone