andyF built a stock stroke 400 a few years ago that put out ~580HP through an 800 eddie carb. IIRC it had eddie heads and a solid roller cam.
1976 Spinnaker White Plymouth Duster, /6 A833OD 1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!*** 2011 Toxic Orange Dodge Charger R/T 2017 Grand Cherokee Overland 2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)