[Hib Halverson]

Here's what you need for #8.

3/8-drive, plug socket with integral universal and either an internal magnet or sponge retainer.
3/8-drive, one-inch extension
3/8-drive universal joint.

Stick all that on a long extension. It goes easily down the plug well. With the socket on the plug, the point at which the extension swivels on the top u-joint is just above the edge of the plug well.

I use a 30-in extension and a 3/8-drive T-handle to loosen and tighten plugs on an LT5.

Also, I use taper seat plugs which interfaces with the head on the taper which is how the plug seals. I use DuPont Krytox antiseize on the plug threads only.

For plugs, for the last 15 years or so, I've used the Denso IT-22 which is a range colder than the original LT5 plug (FR-1LS).