Planning on 110-M heads and a Crane .420 roller which is 276/280 on 112. (Gross lift isn't really known yet because rockers are undecided, but right around .630).

Much as I hate to admit it, overall specs are going to end up not too far off from Indy's 572 street crate engine. They are claiming a big improvement when the dual plane/4500 is used on that engine. But I have yet to see one in the wild or talk to anyone who has tried it.