Comp XE268H v Crow 18619 - 318

Barra,
In an engine like yours, anyone can install a cam with a few degrees more duration....& the butt-meter will feel the difference. Now, half way through the thread you have added that you would like a lumpy idle.
David Vizard has a couple of expressions that I like:
- I do not have an opinion, I have a dyno.
- The right cam costs the same as the wrong cam.
If you really wanted to see what worked best in your engine, you would probably have to try a few cams & spend the $$$. DV did just that. Tested over 19,000 cam combinations at Crane cams....& more. From that he derived the 128 rule, which you will find on the web. Works for street CRs & parallel valve heads.
The last thing you want is a cam with 112-114 LSA. Too wide. 106 would probably be ideal but a shelf grind with short enough duration might be hard to find.
That is why I recommended the Isky Mega cam, a compromise with 108 LSA. Using 1.6 rockers increases effective duration about 2-3*. I suspect the seat of the pants difference between 1.5 & 1.6 rockers would be hard to feel & you might think the 1.6s not worth the extra $$$.