Help me win this argument 400 in a 72.

I guess my day has passed. I'm from the days when mopars had real factory horsepower and for just a few bucks and a good tune, you were off and rolling. no stroking,special pistons, fancy heads, etc. you had raw power for a reasonable price.

You are way behind the times. Today the technology has evolved so much with speed parts that even a 318 can run like hell.