I didn’t know with a hydraulic block if the holes would allow them to fill with oil and overflow to lube the pushrod cup on top. Would actually prefer no top hole if such would allow more/better oil retention for the pushrod.
Matthew 6:33
1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com