354 or 392? Hemi? Questions?

Well guys it's a 291 desoto.... So 185hp 245 torque doesn't seem worth it to drop in my duster with that low of power and I don't want to supercharger just drop it in. Hmm conviemce me one way or another? Go for it or leave it and try to find a. 331,392,354,330,341,345?!?