Ready to replace bearings and install cam......What's a good spec??

[ALS85GT]

the cam choice would also depend on how you would like your idle and possible the vacume avail for power brakes. As an example, I have a 5.0 using a 498"lift Exh, & 220"duration. It idles a bit lumpy which is fine w/me. For a larger displacement engine like yours I would go higher, say 520" by 236". This would give you noticable power but w/a lumpy idle. my 2 cents....