Here are captains bars. Look for two vertical, raised, parallel bars above the starter. They also apppear on the drivers (manifold side). I'll try to find a pic. Here's Geezer's 261, notice captain's bars, as above vertical, raised, parrallel, superior to and center of new brass plugs. Of course this is the manifold side. Notice too the half inch oil ports.

~ Cosmo
1949 Chevy Half Ton
Rocinante, like Don Quixote, he is awkward, past his prime, and engaged in a task beyond his capacities.
"...my good horse Rocinante, mine eternal and inseparable companion in all my journeys and courses." ...Don Quixote, Cervantes
"If you come to a fork in the road, take it."...Yogi Berra
"Rudeness is the weak man's imitation of strength." ...Eric Hoffer