no oil pressure

When the pushrod broke it blew the lifter out and there went my oil pressure. The pushrods were hollow but the ends wernt I think that's why it broke instead of bending.
This is a 1974 dodge 360 with 350hp.
Does anyone know what the cc are for the 4448308 head? The 308 heads are on the drivers side and all this happened on the passenger side .