My B1 499 has both pushrod oiling and spray bar. They got the oil for the spray bars from the side of the block. When I put in the 440-1 540 (also has pushrod oiling) I think I will use the spray bar oiling valve covers on it too. Why not? 2 seperate oil sources and the springs get a little cooling.

The pushrod oil supplies the needle on the shaft and also for the rollers on the T&D.

Edit: I was looking at the valve covers last night. The spray bar is over the pushrods/rockers and I have no idea how that would help as the adjusters are sockets and shrouded by the 1.7 T&D rockers.