clutch fan gap too short

Did they even come with a clutch fan back then? That would explain why it's all so tight. Is the radiator support one that has a "filler panel" for the /6 radiator? Maybe there is a fabrication solution there.
Nope they did not come with a fan clutch with the slant six. Yup the radiator core will need to be pushed back towards the grill by 1/2 inch to clear that 1969 Volovo fan clutch, thats the biggest issue.