Welcome back, Glad to see your project underway. I have one question though. I worked in the performance engine build for the last 10 years so I have some experiance, why put such a restrictive head (i know they are 1 of the best stock head that dodge produced) for such a big motor? The x heads on my 340 is the restrictive point, it made just under 500 hp and I know if I changed them to eddies, or the b1's sitting under the work bench then it would have made another 75+ hp. Just my .02 cents. I know cost becomes a factor but if going with the forged internals and big cubes you should put on a set of good heads. Down fall to the b1's are there are no mounting holes for the accessories. Not knocking your plan just trying to help out. Either way it sounds like on heck of an engine.