318 engine brackets for left side water pump outlet

Small blocks have a drivers side and a passenger side inlet for water pumps. I believe 69 back is drivers side and 70 up is passenger side. Both will bolt to any small block, however if you have a 70 up motor and run a 69 or older pump the inlet hides the timing marks. You can barely see them or just make your own on the passenger side. I know 1968 318 came with a bolt on timing tab that you can bolt on newer motors and use. You have to use timing tape and remark to balancer.