Callies, Indy, BMP hemi block ?'s

Callies hemi block is being shipped

Indy has re-tooled and looks to be an improvement.

Bill Mitchell Products hemi block is being shipped and they say they want to have them on the shelf for sale.

So now that we seem to have these choices, what are the pro's and cons of each block?

Hopefully we can have a good discussion.

I tried a quick search (and it was quick) wanting to the know the difference between the aftermarket blocks too- the mega block, world block, etc. Which is the weaker one that is only slightly better than a stock block?

This is a question for Todd @ Marsh,he is a dealer for KB and indy. Not sure if he is a vendor on the other two.

I'm outside the US & with your $ dropping I'm thinking nows a good time to buy a new block, so I too am kinda keen to knopw the differences. I already have an Indy block motor but its a B engine, I'm wanting to go 572, keen to seen how this thread goes.