400/426 Stroker. Ever heard of one?

The $1600 includes the rings and bearings. I do still need to balance the crank which is gona cost me another $125. I’m aim for a 5k overall budget for the long block. Still not sure what I’m going to do for heads but, I’m leaning towards some 915s or worked 452s. I doubt I could squeeze in aluminum heads but, it sure would be nice.
So where did u get this kit? Do u have a link? Thanks. Kim