George,
I don't think you can use those heads on that 85 block. The 95 LT engine has reverse coolant flow, and there isn't any coolant passages from the manifold to the head. Your better bet would be the Vortec heads or the GMPP fast burn heads. You need the right intake for the Vortecs but they work really well, I have a set on my 70 Nova and I love them. Hope this helps.
Sean
