Another surprise

As I have mention before I am doing the front under carriage and engine bay on the vett. So I took out the radiator and took it to the shop and he told that its to far gone to clean and two this is not a 70 vette radiator? He thought it look like a 73 and up one. There is nothing that Bubba has not touch in this car. So I look at the the radiator frame and it looks like a 73 frame. SO the question is can a 70 vette radiator fit in the 73 radiator support it looks like the are to bolts hole at the bottom of the 70 frame. Or do I spend more and get the frame?