[Double Venom]

Artic,
I'm sorry, but I and Don both missed your original post. Yes, you can pull the head while the engine is in the car. Even though the head is aluminum, it helps to have four hands to guide it out without hitting the firewall, especially if it's painted.

On the 460 block it is very easy and common for the intake manifold gaskets to slip downaward while installing the heads, causing a small and very annouying coolant leak. (SVO shipped many, many 460 blocks with this very problem!)

If you pull the heads, let us know what you find.

DV