Supercharged 410/408 stroker?

N/A 408s already push the limits of stock 340/360 blocks, if you really want a serious blown 408 I'd recommend starting with an R-block from Mopar Performance. This is just me but if I was making a blown 408 it would be an R3-W9 (I think, whichever 'W-' heads are aluminum) engine with the 'corrected' 48* lifter angle. Unless of course you already have all the stuff you mentioned in the original post...