I love the MR BBM heads, and think high riser heads would be super cool, especially with a 1x4 and 2x4 intake available. I think it's fantastic they are considering making things like that.
but.....
I'm sure lots of people would be thrilled if both their heads AND iron/aluminum blocks would be available on a regular basis. Fancy new 427 heads don't do me any good if I can't find a 427 block.
Not trying to be critical of a company, but the FE community already has too many vendors with spotty availability. Blue Thunder comes to mind.... I'm certain the FE enthusiast would love for many of their parts to be "on the shelf" so to speak. Same goes with 427 blocks.
That said,
thankyouverymuch BT, BBM, Survival, FE Power, DSC Motorsports, and all the others that lay out hundreds of thousands of dollars to produce high end parts for us hobby car guys.