You could switch to a 67- 68 timming cover and cast iron water pump, a bit sorter. Or as 67dart273 said move to fan to one side.
OR you could got rid of the BS cross flow aluminum radiator and electric fan and get an oem copper brass rad, mechanical fan and oem shroud and start enjoying your car.
There is no way oem copper brass rad and mechanical fan will fit in that tight space. What’s the thickness of rad, fan and shroud. I’m only working with 6” max
