There are different "avenues" of lubrication of lifters on different years of 235s (1941-1963).
And, as stated above, there might be different "avenues" of lubrication of lifters in the same years, depending on the year of the block and if the block was set up for hydraulic or mechanical (solid) lifters.
From around 1958 and upwards, car and truck blocks were all set up for hydraulic lifters, even though all truck 235s/261s came with solid/mechanical lifters. From 1956 onwards, all 235 car blocks had hydraulic lifters. From 1950-1955(?), 235 car blocks had hydraulic lifters if the car was equipped with a Powerglide transmission.
I do not know if truck blocks had specific lifter-lubrication passages prior to 1958 - maybe in some years the oil dripping down the drain holes in the head onto the lifters/push-rods provided sufficient lubrication to the lifters?
Please correct/clarify the above, if necessary.
