I would go with GM846 mainly because chances are your CC305 is a CAST grind while your GM846 will be a BILLET cam which IMHO is very nice to have!

I love the quality of Crane cams, so far all I like from Comp is their pushrods & rockers.

BTW, there is another cam GM/CRANE makes on a 111lsa that passes emissions & comes stock on LT1s guess where you could find it?

Ok screw it, look at the specs for an IMPALA SS 94-96 LT1 cam its tiny but its on a 111lsa LOL, passes emissions all day long. When you think cams there is a tad bit more then just LSA