I'm familiar with all that. But there are a lot of head/rocker/lifter options that get set aside or complicated using the Mag block. It's already being machined, two more holes to allow seamless LA head use aren't going to break the bank and then you can bolt up that old set of W2 heads and rockers without any additional gymnastics. They are giving those HS rockers away and there is still a lot of viable stuff out there.