Horsepower with mileage options

I think that the way to go would be keep the iron heads, stock 340 cam, 4bbl intake either stock steel or aluminum, and carb to match, dual exhaust and a set if 355's out back

That's pretty much what I did with mine, except I used an HE268 cam. I also added headers.

That's plenty enough to get a young fella in trouble, lol.