Awesome, thanks for specs. U should post a pic of the crank, I as well as others would be interested. I'm also working on a similar build. I will say that member Fisher made some impressive power with O OTB eddy heads on a 426.
I will find and post some Pics of the angle grinder "windage" Crank Prep for less parasitic power loss,
as opposed to actually "machining" the counterweights which merely makes the Crank "Fit" the Block with no gain.
2 birds with 1 stone..... FIT it.... AND Gain power.
The size of "compressor" underneath in my experience, merely determines basically "where" the peak power events will occur for a given Cylinder Head Flow.... not how much power ? That is determined by the HEAD.
No offense to Fisher intended, he has a very FINE Engine.... but IMO, his 505HP with 540 Lbs Torque should be seen as pretty much "normal", utilizing un-ported Edelbrock Heads ?
GREAT GAINS can be had..... even on a 426 inch "Compressor" when the Eddy's are Ported, with a Flat Tappet Cam ??