Do they raise compression like the 6.1 heads? Yes, but more than a 6.1 head will.
Do they have egr? its cut into the head on the exhaust side. but thats as far as it goes. no exit ont he front of the head. it could probably be made to work. but its better off with out it.
Does the springs need upgrading from stock? depends on cam. but i would say yes to most any aftermarket cam.
Can I use my forged 5.7 push rods? nope. not even close to the right length
they come on a 5.7 correct but they have a intake and exhaust just like a 6.1 head? thats correct. while they still dont use the same manifold/s the port shape on the heads are the same for the new 5.7 intake and exhaust manifolds as all of the 6.1 stuff.
Hope this helps.