I don't mean to speak for Todd, but it is my understanding that he didn't get as many BMP blocks as he expected during the last delivery.
My new B1 motor has a BMP block from Todd (I got it in April), and I put my name on Todd's list for another block during the summer (I was thinking get them while I can), and that block has not arrived yet.
The next block is to put my existing recip assembly into (from my Daytona). Currently an old Chrysler factory block from the 1970's

Good luck. All parts are harder than ever to get.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1