What is the horse power benefits

Thanks for the info. I have been building mopars for close to 50 years mostly RBs and chevys before that. Got hooked on mopar when I bought my 69 road runner have driven nothing else since and all kids drive mopar also. Trained them well!! So I am thinking 360 bored 30 over good heads that breath, purple shaft, AVS on top of a performer intake. Y tube headers 3 inch exhaust. Don't need a fire breather at 73. Just something to put these modern cars in there place once in a while. Thanks again may stroke the 360 not sure yet.
That's not gonna be so easy, many modern cars are putting out enough hp/ci, that Your 'teener'd have 457hp. That's NA, they're runnin' 13:1 on pump regular, sooo I'd set the dial on 'FUN' & roll...the plus for You is most new cars are heavy by comparison.