I took a few pictures of the bolts holding my radiator on my 69 SB Camaro. It has 13k original miles on it (Ohio car). I don't think the radiator has ever been out of the car. I don't know if BB and SB had same mounting pattern, Mikey will know.
Here are the bolt from the driver's side:
Passenger side: Bolts have points:
Overall picture:
