That lobe looks ok. From your photo it is hard to tell if the lobe is rounded or not. I took the oil pan off a 261 last night and the pump lobe looked just like that. I had to take a closer look to see the lobe was indeed good to go.
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns..... 1950 GMC 450 1951 Chevy 1/2-Ton The GreenMachine In the Stovebolt Gallery