Stock-appearing 340 build

I'm sure it is a tall order. Would like 425 or so HP out of a strip/show with '71-'73 stock manifolds, X-pipe exhaust, 3.23 gears, built 904, and a Thermoquad on a stock iron intake between iron heads. (may or may not be stock) Pump gas is a must. High test is fine. Want to be able to start anytime to cruise. This is the soon-to-be-retired daily's 340. I'll have the Aspen up soon.
Author: 270SE