5.9 magnum tuning?

yes i seen on this web achip that pugs in some where in wiring .they say it will give you 69 more ponys for 69.00 dyno proven .....i putting 318 mag in 1964 valaint and i am interested in chip if you see it pm me ...... this is astock motor what ans increase 304 ponys

Is it the Jet chip by any chance? That one don't work. Computer evntually adapts to it, and its effect is adjusted out.

Superchips 3715 works GREAT for a stock motor. I used it on mine before I got a cam. It isn't adjustable, but it is nice for a stock cam type setup.