Hm... Ok thanks on the lifter diff, it was in the title and I was looking intently at the spec section, Duh.
Looks like all their current BB heads have the core plug in the end if you can trust their pics. The offset rockets may be an issue, I prefer to run old iron adjustables for their simplicity and ruggedness, so these may not be for me despite the super sale price.
I wouldnt go by the pictures, they might not be accurate. I would actually use a phone and call them. There might be a good price on the rpm copies too. I never buy anything on line if there is an alternative way, such as a real human on a phone.