I'm building a 500hp smooth idling 393 for my 67 vert, I'm somewhat duplicating this build but with efi and dif heads.
I cant find the exact link but go to
www.enginemasters.com and click on small block fords and check out the 393 build I think it was called "wicked windsor in a box" over 500hp and 500 ftlbs with a smooth idle and great vaccuum. Think of what that hp and a 150 shot of N2o would feel like?