The above is expensive and take awhile, but probably fitting the quote unless the quote also includes the thought of inexpensive.
Which would be mill heads for a reasonable ratio.
(Larger intake valve and/or bowl porting an option $$$ )
Install 340 cam or larger.
Headers help, but they all suck unless you spend big for Dougs or tti's. Which I'd finish up in 2-1/2 exhaust pipe size.