DrEamer; the cams are different but you can run a cam drilled for LA oiling in a Magnum block with no problems.
With the rocker arms that Toluene56 posted in pictures, you could even run LA heads with shafts on a Magnum block that is not drilled for LA oiling, or on either block with a cam that is not LA drilled, or any combination of block and cam that has the cam bearings installed rotated to block off oiling to the heads.
The other questions is, has anyone run these rockers without normal oil feed through the cam and block, oiling ONLY through the lifters and pushrods? How is the durability?
