Am I just crazy or are there 2 differant Magnum 281HR cams, been looking into that cam and have found one that has the specs lised as 220 duration,.512 lift and a 110 lsa and the one I like, part # 35-302-8 has specs as 220/224-281-284 duration and .512/.533 lift on a 112 lsa, will the one I listed a part number for work in my 5.0?