Fortunately I have a few of these fine engine laying around.

Here is a photo of my 261 in the truck, with the dowel pressed in.

Dowel in

Here is a photo on one that is out, or in bypass mode.

Dowel flush

SWEET
Sergeant At Arms: Old Dominion Stovebolt Society
BUNS?!?!?!Where we're going, we don't need no buns.....
1950 GMC 450
1951 Chevy 1/2-Ton
The GreenMachine
In the Stovebolt Gallery