I have a stock 1985 IROCZ equipt with the 305 LB9. I am currently rebuilding the engine and was wondering if I could get away with running the stock tune with this upgraded camshaft. Below I included the stock specs and the upgraded cam specs.

 

I have a cam with those specs in a small block Ford, and it idles like a stock cam, so I imagine it would work fine with your setup (I assume itis gound with 4 or 5 degrees advance).
It's not the greatest cam choice and If I had it to do over again, I would go with something different...