1970 factory 396/375 radiator OO IL

[motion396nova]

I wanted to know if anybody on this site can tell me whether or not the 1970 factory 396 radiator was a bolt in or just set in rubber track. I have the original radiator harrison with markings OO IL dated J wich would indeed match all my date codes, but the tank does not have the bolt on side plates. I talked with a fellow from chicago who has had several nova l78's. He said the 70 cars had the bolt in radiator support, but the radiators were set in style. Does anybody have any information about this. My car was wrecked and I know for sure that the radiator support was damaged and replaced, but the radiator seems to be original according to the codes and date. I want to know if the brackets were removed or if it was made that way?? Thanks Motion396