Yes I agree. We have 3 aluminum blocks. This is the small one at 414” and the big one is 477”. It also has W8 heads.
1 block is a spare in case something happens.
What are the specs on the 477?
I have two new A blocks on the shelf, w W8 Chapmans, 4.25" stroke, not sure they will ever get built, everything so bespoke to the build.
Considered doing a Ritter Alum block, that seems to be its own minefield.