[Prowbar]

Installed the 478 today. Took the engine off the stand with the engine hoist, then installed the bell housing, flywheel, pressure plate, clutch, starter, engine wiring harness. Checked the bell housing runout, .003". Pilot bearing runout is less than .002". Used the same method of removing the rocker assemblies and using a head bolt with a piece of strip as a mount for the chain.
Very satisfied with the install. Then installed the transmission.
Had to take the SM420 top cover off to clear the firewall.
Used new motor mounts (Thanks for the Anchor part numbers, Funky61)

After installation, we pulled the engine as much forward as we could to give the right side exhaust manifold as much clearance as possible. There is about 7/16" clearance between the manifold and firewall now.

Now, onto reinstalling the rest...