a/c brackets and pullieys

'70 and up small blocks run an aluminum water pump with passenger's side lower hose. '69 and earlier run a cast iron water pump with lower hose on driver's side. You have to have a radiator with the correct lower hose location. The pulley offsets are different between early and later small blocks. The '70 up pulleys are reproduced and the '69 and earlier pulleys are not.